diff --git a/src/lib.rs b/src/lib.rs
index 75225a4..a5c3e7d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,6 +1,14 @@
 pub mod sources;
 pub mod targets;
 
+#[macro_export]
+macro_rules! fatal {
+    ($($arg:tt)*) => {{
+        tracing::error!($($arg)*);
+        std::process::exit(-1);
+    }};
+}
+
 use async_trait::async_trait;
 use chrono::{DateTime, Utc};
 use figment::{
diff --git a/src/main.rs b/src/main.rs
index d334bf2..2035e8b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -206,6 +206,10 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     debug!("Task setup complete, tasks: {}", tasks.len());
 
     ctrlc::set_handler(move || {
+        if shutdown_token.is_cancelled() {
+            info!("Forced shutdown");
+            std::process::exit(1);
+        }
         info!("Shutting down");
         shutdown_token.cancel()
     })
diff --git a/src/sources/prs10.rs b/src/sources/prs10.rs
index cf1f264..9a63ef1 100644
--- a/src/sources/prs10.rs
+++ b/src/sources/prs10.rs
@@ -15,7 +15,7 @@ use tracing::{debug, debug_span, error, info, instrument, warn};
 
 use crate::{
     ChimemonMessage, ChimemonSource, ChimemonSourceChannel, MetricTags, Prs10Config, SourceMetric,
-    SourceReport, SourceReportDetails, SourceStatus,
+    SourceReport, SourceReportDetails, SourceStatus, fatal,
 };
 
 #[derive(Debug)]
@@ -205,19 +205,28 @@ impl TryFrom<&[u8]> for Prs10Status {
             .map(|s| str::from_utf8(s).unwrap().parse::<u8>())
             .collect_tuple()
             .ok_or("Not enough parts in ST reply")?;
+
+        let volt_lamp_flags = volt_lamp_flags?;
+        let rf_flags = rf_flags?;
+        let temp_flags = temp_flags?;
+        let fll_flags = fll_flags?;
+        let pps_flags = pps_flags?;
+        let system_flags = system_flags?;
+
         Ok(Self {
-            volt_lamp_flags: Prs10PowerLampFlags::from_bits(volt_lamp_flags?)
-                .ok_or("Invalid bits set ({volt_lamp_flags}) for power/lamp flags")?,
-            rf_flags: Prs10RfFlags::from_bits(rf_flags?)
-                .ok_or("Invalid bits set ({rf_flags}) for RF flags")?,
-            temp_flags: Prs10TempFlags::from_bits(temp_flags?)
-                .ok_or("Invalid bits set ({temp_flags}) for temp flags")?,
-            fll_flags: Prs10FllFlags::from_bits(fll_flags?)
-                .ok_or("Invalid bits set ({fll_flags}) for FLL flags")?,
-            pps_flags: Prs10PpsFlags::from_bits(pps_flags?)
-                .ok_or("Invalid bits set ({pps_flags}) for PPS flags")?,
-            system_flags: Prs10SystemFlags::from_bits(system_flags?)
-                .ok_or("Invalid bits set ({system_flags}) for system flags")?,
+            volt_lamp_flags: Prs10PowerLampFlags::from_bits(volt_lamp_flags).ok_or_else(|| {
+                format!("Invalid bits set ({volt_lamp_flags}) for power/lamp flags")
+            })?,
+            rf_flags: Prs10RfFlags::from_bits(rf_flags)
+                .ok_or_else(|| format!("Invalid bits set ({rf_flags}) for RF flags"))?,
+            temp_flags: Prs10TempFlags::from_bits(temp_flags)
+                .ok_or_else(|| format!("Invalid bits set ({temp_flags}) for temp flags"))?,
+            fll_flags: Prs10FllFlags::from_bits(fll_flags)
+                .ok_or_else(|| format!("Invalid bits set ({fll_flags}) for FLL flags"))?,
+            pps_flags: Prs10PpsFlags::from_bits(pps_flags)
+                .ok_or_else(|| format!("Invalid bits set ({pps_flags}) for PPS flags"))?,
+            system_flags: Prs10SystemFlags::from_bits(system_flags)
+                .ok_or_else(|| format!("Invalid bits set ({system_flags}) for system flags"))?,
         })
     }
 }
@@ -488,8 +497,20 @@ impl ChimemonSource for Prs10Monitor {
             .parity(tokio_serial::Parity::None)
             .stop_bits(tokio_serial::StopBits::One)
             .flow_control(tokio_serial::FlowControl::None);
-        let mut port = SerialStream::open(&builder).expect("Must be able to open serial port");
-        port.set_exclusive(true).expect("Can't lock serial port");
+        let mut port = SerialStream::open(&builder).unwrap_or_else(|e| {
+            fatal!(
+                "Failed to open serial port `{}` ({})",
+                config.port,
+                e.to_string()
+            )
+        });
+        port.set_exclusive(true).unwrap_or_else(|e| {
+            fatal!(
+                "Can't lock serial port `{}` ({})",
+                config.port,
+                e.to_string()
+            )
+        });
         info!(
             "Opened serial port {}@{}",
             port.name().unwrap(),
@@ -505,10 +526,15 @@ impl ChimemonSource for Prs10Monitor {
             info: OnceCell::new(),
         }
     }
+
     async fn run(mut self, chan: ChimemonSourceChannel, cancel: CancellationToken) {
         info!("PRS10 task started");
+        if let Err(e) = self.reset_rx_state().await {
+            error!(error = ?e, "Error clearing PRS10 RX state");
+            return;
+        }
         if let Err(e) = self.set_info().await {
-            error!("Error starting PRS10: {e:?}");
+            error!(error = ?e, "Error starting PRS10");
             return;
         }
         info!(