diff --git a/battery/src/main.rs b/battery/src/main.rs
index 8afe7ab..a4e5bd0 100644
--- a/battery/src/main.rs
+++ b/battery/src/main.rs
@@ -39,7 +39,7 @@ fn threshold_sane(thresh: Threshold) -> Option<Threshold> {
 }
 
 fn parse_threshold(thresh: String) -> Option<Threshold> {
-    let mut s = thresh.clone();
+    let mut s = thresh;
 
     let last = s.pop();
 
@@ -93,7 +93,7 @@ fn format_duration(duration: f32) -> String {
     }
     let mut s = String::new();
     if d < 0 {
-        s.push_str("-");
+        s.push('-');
         d = -d;
     }
     let hours = d / 3600;
@@ -105,11 +105,11 @@ fn format_duration(duration: f32) -> String {
         s.push_str(&format!("{}h", hours));
     }
     if minutes > 0 {
-        if hours > 0 { s.push_str(" "); }
+        if hours > 0 { s.push(' '); }
         s.push_str(&format!("{}m", minutes));
     }
     if seconds > 0 {
-        if hours > 0 || minutes > 0 { s.push_str(" "); }
+        if hours > 0 || minutes > 0 { s.push(' '); }
         s.push_str(&format!("{}s", seconds));
     }
     s
@@ -205,29 +205,29 @@ fn main() -> battery::Result<()> {
         if state != last_state {
             match state {
                 State::Charging => {
-                    battery.time_to_full().map(|ttf| {
+                    if let Some(ttf) = battery.time_to_full() {
                         osd.title = Some(format!("Charging, {} until full", format_duration(ttf.value)));
                         osd.urgency = Urgency::Low;
                         osd.update().unwrap();
-                    });
+                    };
                 }
                 State::Low => {
-                    battery.time_to_empty().map(|tte| {
+                    if let Some(tte) = battery.time_to_empty() {
                         osd.title = Some(format!("Low battery, {} remaining", format_duration(tte.value)));
                         osd.urgency = Urgency::Normal;
                         osd.update().unwrap();
-                    });
+                    };
                 },
                 State::Normal | State::Critical => { }
             }
         }
 
         if state == State::Critical {
-            battery.time_to_empty().map(|tte| {
+            if let Some(tte) = battery.time_to_empty() {
                 osd.title = Some(format!("Critically low battery, {} remaining", format_duration(tte.value)));
                 osd.urgency = Urgency::Critical;
                 osd.update().unwrap();
-            });
+            };
         }
 
         thread::sleep(Duration::from_secs(refresh_interval));
diff --git a/bluetooth/src/main.rs b/bluetooth/src/main.rs
index b46249d..1da89d4 100644
--- a/bluetooth/src/main.rs
+++ b/bluetooth/src/main.rs
@@ -32,7 +32,7 @@ fn main() {
     loop {
         let device = adapter.get_first_device().unwrap();
 
-        device_name = device.get_name().unwrap_or(String::from(""));
+        device_name = device.get_name().ok().unwrap_or_else(String::new);
 
         if device_name != last_device_name {
             osd.title = Some(format!("Bluetooth: connected to {}", device_name));
diff --git a/brightness/src/main.rs b/brightness/src/main.rs
index d82b878..64e4374 100644
--- a/brightness/src/main.rs
+++ b/brightness/src/main.rs
@@ -28,7 +28,7 @@ fn main() {
     loop {
         b = brightness.get_brightness().unwrap() as f32;
 
-        if b != last_b {
+        if (b - last_b).abs() > 0.1 {
             osd.contents = OSDContents::Progress(b/m, OSDProgressText::Percentage);
             osd.update().unwrap();
         }
diff --git a/common/src/lib.rs b/common/src/lib.rs
index 76e4531..7891efe 100644
--- a/common/src/lib.rs
+++ b/common/src/lib.rs
@@ -154,24 +154,24 @@ pub mod notify {
 
             let notification = Notification::new();
 
-            return OSD {
+            OSD {
                 title: None, icon: None,
                 contents: OSDContents::default(),
                 urgency: Urgency::Normal, id: None,
                 timeout,
                 length, full, empty, start, end,
                 notification
-            };
+            }
         }
 
         fn construct_fake_handle(id: u32, notification: Notification) -> NotificationHandle {
             let h = CustomHandle
-            { id: id,
+            { id,
               connection: Connection::get_private(BusType::Session).unwrap(),
-              notification: notification };
+              notification };
             unsafe {
                 let handle : NotificationHandle = std::mem::transmute(h);
-                return handle;
+                handle
             }
         }
 
@@ -197,16 +197,16 @@ pub mod notify {
 
                     s.push_str(self.end.as_str());
 
-                    s.push_str(" ");
+                    s.push(' ');
 
                     match text {
                         OSDProgressText::Percentage => {
                             s.push_str(((value * 100.) as i32).to_string().as_str());
 
-                            s.push_str("%");
+                            s.push('%');
                         },
                         OSDProgressText::Text(text) => {
-                            text.as_ref().map(|text| s.push_str(text.as_str()));
+                            if let Some(text) = text.as_ref() { s.push_str(text.as_str()) };
                         }
                     }
 
@@ -218,7 +218,7 @@ pub mod notify {
             self.id.map(|i| self.notification.id(i));
             let handle = self.notification
                 .summary(self.title.as_deref().unwrap_or(""))
-                .body(&text.unwrap_or("".to_string()))
+                .body(&text.unwrap_or_else(String::new))
                 .icon(self.icon.as_deref().unwrap_or(""))
                 .urgency(self.urgency)
                 .finalize()
@@ -246,4 +246,10 @@ pub mod notify {
             self.fake_handle().close();
         }
     }
+
+    impl Default for OSD {
+        fn default() -> Self {
+            Self::new()
+        }
+    }
 }
diff --git a/mpris/src/main.rs b/mpris/src/main.rs
index 3461458..073aca1 100644
--- a/mpris/src/main.rs
+++ b/mpris/src/main.rs
@@ -175,8 +175,8 @@ fn main() {
 
     let mut progress_tracker = player.track_progress(100).unwrap();
 
-    let update_on_volume_change = config.clone().lock().unwrap().get_default("default", "update on volume change", true);
-    let timeout = config.clone().lock().unwrap().get_default("default", "notification display time", 5);
+    let update_on_volume_change = config.lock().unwrap().get_default("default", "update on volume change", true);
+    let timeout = config.lock().unwrap().get_default("default", "notification display time", 5);
 
     let trigger = Arc::new(Mutex::new(SystemTime::now()));
 
@@ -185,7 +185,6 @@ fn main() {
         Some(volume_changes::VolumeMonitor::new(config.clone(), trigger.clone(), dismissed.clone()))
     } else { None };
 
-    drop(update_on_volume_change);
     drop(config);
 
     let mut title;
@@ -204,13 +203,13 @@ fn main() {
             dismissed.lock().unwrap().store(false, Ordering::Relaxed);
         }
 
-        let elapsed = trigger.lock().unwrap().elapsed().unwrap_or(Duration::from_secs(timeout + 1));
+        let elapsed = trigger.lock().unwrap().elapsed().unwrap_or_else(|_| Duration::from_secs(timeout + 1));
 
         if elapsed.as_secs() < timeout && playback_status != PlaybackStatus::Stopped && ! dismissed.lock().unwrap().load(Ordering::Relaxed) {
             let metadata = progress.metadata();
-            let artists = metadata.artists().and_then(|artists| format_artists(artists)).unwrap_or("Unknown".to_string());
+            let artists = metadata.artists().and_then(format_artists).unwrap_or_else(|| "Unknown".to_string());
             let position = progress.position();
-            let length = progress.length().unwrap_or(Duration::from_secs(100000000));
+            let length = progress.length().unwrap_or_else(|| Duration::from_secs(100000000));
 
             osd.title = Some(format!("{:?}: {} - {}", playback_status, title, artists));
             let ratio = position.as_secs_f32() / length.as_secs_f32();
@@ -240,6 +239,6 @@ fn main() {
         old_playback_status = playback_status;
 
         #[cfg(feature = "display_on_volume_changes")]
-        vc.as_ref().map(|v| v.tick());
+        if let Some(v) = vc.as_ref() { v.tick() };
     }
 }