diff --git a/application.c b/application.c
index 941b1df..d079696 100644
--- a/application.c
+++ b/application.c
@@ -68,7 +68,7 @@ static volatile bool rtc_internal_second_flag = false; /**< set when a second pa
 #define BED_PIN_LK3 PC15 /**< pin connected to link 3 */
 #define BED_PIN_LK4 PB1 /**< pin connected to link 4 */
 
-#define LID_TEC_CHANNEL 0 /**< PA0/ADC12_CH1 is connected to the 12 kOhm thermistor in the lid heater */
+#define LID_TEC_CHANNEL 0 /**< PA0/ADC12_CH0 is connected to the 12 kOhm thermistor in the lid heater */
 #define LID_HEATER_PIN PA10 /**< pin to optocoupler cathode controlling triac to lid heater */
 #define LID_HEATER_TIMER 1 /**< timer connected to lid heater pin */
 #define LID_HEATER_CHANNEL 3 /**< timer channel connected to lid heater pin */
@@ -115,7 +115,7 @@ const uint8_t channels[] = {ADC_CHANNEL17, ADC_CHANNEL(LID_TEC_CHANNEL)}; /**< v
 static bool ds18b20_present = false; /**< if DS18B20 temperature sensor is present */
 
 /** target temperature to be reached by the lid */
-static double lid_target = NAN;
+static float lid_target = NAN;
 /** target temperature to be reached by the bed */
 static uint16_t bed_target = 0;
 
@@ -231,7 +231,7 @@ static void lid_power(uint8_t percent)
 	}
 }
 
-/** run PID control for lib temperature */
+/** run PID control for lid temperature */
 static void lid_pid(void)
 {
 	// I tried Ziegler–Nichols method, but it overshoots and oscillates far too much (even with the no overshoot rule)