diff --git a/gpodder_sqlite/src/lib.rs b/gpodder_sqlite/src/lib.rs
index 10de4e4..579889c 100644
--- a/gpodder_sqlite/src/lib.rs
+++ b/gpodder_sqlite/src/lib.rs
@@ -71,11 +71,10 @@ pub struct AddQueryDebugLogs;
 
 impl CustomizeConnection<SqliteConnection, diesel::r2d2::Error> for AddQueryDebugLogs {
     fn on_acquire(&self, conn: &mut SqliteConnection) -> Result<(), diesel::r2d2::Error> {
-        conn.set_instrumentation(|event: InstrumentationEvent<'_>| match event {
-            InstrumentationEvent::StartQuery { query, .. } => {
+        conn.set_instrumentation(|event: InstrumentationEvent<'_>| {
+            if let InstrumentationEvent::StartQuery { query, .. } = event {
                 tracing::debug!("{}", query);
             }
-            _ => {}
         });
 
         Ok(())
diff --git a/gpodder_sqlite/src/models/device.rs b/gpodder_sqlite/src/models/device.rs
index 25d3052..1c72f89 100644
--- a/gpodder_sqlite/src/models/device.rs
+++ b/gpodder_sqlite/src/models/device.rs
@@ -58,21 +58,6 @@ impl Device {
             )
             .get_result(conn)
     }
-
-    pub fn by_device_id(
-        conn: &mut SqliteConnection,
-        user_id: i64,
-        device_id: &str,
-    ) -> diesel::QueryResult<Self> {
-        devices::dsl::devices
-            .select(Self::as_select())
-            .filter(
-                devices::user_id
-                    .eq(user_id)
-                    .and(devices::device_id.eq(device_id)),
-            )
-            .get_result(conn)
-    }
 }
 
 impl NewDevice {
diff --git a/gpodder_sqlite/src/repository/device.rs b/gpodder_sqlite/src/repository/device.rs
index 4b91a06..f457da4 100644
--- a/gpodder_sqlite/src/repository/device.rs
+++ b/gpodder_sqlite/src/repository/device.rs
@@ -1,7 +1,7 @@
 use std::collections::HashSet;
 
 use chrono::{DateTime, Utc};
-use diesel::{alias, dsl::not, prelude::*, sqlite::Sqlite};
+use diesel::{alias, dsl::not, prelude::*};
 use gpodder::AuthErr;
 
 use super::SqliteRepository;
@@ -100,7 +100,7 @@ impl gpodder::DeviceRepository for SqliteRepository {
                 let device = NewDevice {
                     device_id: device_id.to_string(),
                     user_id: user.id,
-                    caption: patch.caption.unwrap_or(String::new()),
+                    caption: patch.caption.unwrap_or_default(),
                     type_: patch.r#type.unwrap_or(gpodder::DeviceType::Other).into(),
                 };
 
diff --git a/gpodder_sqlite/src/repository/subscription.rs b/gpodder_sqlite/src/repository/subscription.rs
index da407a1..6df62ae 100644
--- a/gpodder_sqlite/src/repository/subscription.rs
+++ b/gpodder_sqlite/src/repository/subscription.rs
@@ -29,7 +29,7 @@ fn set_subscriptions_for_single_device(
         .collect();
 
     // URLs originally in the database that are no longer in the list
-    let urls_to_delete = urls_in_db.difference(&urls);
+    let urls_to_delete = urls_in_db.difference(urls);
 
     // URLs not in the database that are in the new list
     let urls_to_insert = urls.difference(&urls_in_db);
diff --git a/src/cli/gpo.rs b/src/cli/gpo.rs
index e4d951b..c50edfb 100644
--- a/src/cli/gpo.rs
+++ b/src/cli/gpo.rs
@@ -20,7 +20,7 @@ impl Command {
 
         match self {
             Self::Sync { username, devices } => {
-                let user = store.get_user(&username).unwrap();
+                let user = store.get_user(username).unwrap();
                 store
                     .update_device_sync_status(
                         &user,
@@ -30,7 +30,7 @@ impl Command {
                     .unwrap();
             }
             Self::Devices { username } => {
-                let user = store.get_user(&username).unwrap();
+                let user = store.get_user(username).unwrap();
                 let devices = store.devices_for_user(&user).unwrap();
 
                 for device in devices {
diff --git a/src/server/gpodder/advanced/episodes.rs b/src/server/gpodder/advanced/episodes.rs
index 9a83cb4..3f61477 100644
--- a/src/server/gpodder/advanced/episodes.rs
+++ b/src/server/gpodder/advanced/episodes.rs
@@ -24,7 +24,10 @@ pub fn router(ctx: Context) -> Router<Context> {
             "/{username}",
             post(post_episode_actions).get(get_episode_actions),
         )
-        .layer(middleware::from_fn_with_state(ctx.clone(), auth_api_middleware))
+        .layer(middleware::from_fn_with_state(
+            ctx.clone(),
+            auth_api_middleware,
+        ))
 }
 
 async fn post_episode_actions(
@@ -84,10 +87,7 @@ async fn get_episode_actions(
         return Err(AppError::BadRequest);
     }
 
-    let since = filter
-        .since
-        .map(|ts| DateTime::from_timestamp(ts, 0))
-        .flatten();
+    let since = filter.since.and_then(|ts| DateTime::from_timestamp(ts, 0));
 
     Ok(tokio::task::spawn_blocking(move || {
         ctx.store.episode_actions_for_user(
diff --git a/src/web/mod.rs b/src/web/mod.rs
index 683732e..f2a03ee 100644
--- a/src/web/mod.rs
+++ b/src/web/mod.rs
@@ -47,7 +47,7 @@ pub struct TemplateResponse<T> {
 impl<T> TemplateResponse<T> {
     pub fn new(tera: &Arc<tera::Tera>, template: T) -> Self {
         Self {
-            tera: Arc::clone(&tera),
+            tera: Arc::clone(tera),
             template,
         }
     }