Clean the dryer moisture sensor when auto dry ends too early, clothes come out damp, or the dryer behaves normally on timed dry but not sensor cycles. The sensor bars can get coated with residue, especially if you use dryer sheets.
Quick signs
- Auto dry stops while clothes are still damp.
- Timed dry works better than sensor dry.
- Small loads dry unevenly.
- The lint screen and vent seem clear.
Where the sensor is
Many dryers have two metal strips inside the drum near the lint screen housing. Your model may be different, so check the manual before scrubbing random parts. If you can't identify the sensor, stop and look up the model.
How to clean it
- Turn the dryer off.
- Let the drum cool.
- Wipe the sensor bars with a soft cloth and mild soap or rubbing alcohol if your manual allows it.
- Dry the area fully.
- Run a normal sensor cycle with a medium load.
Don't use anything harsh unless the manufacturer says it's safe. Scratched or damaged sensor bars can create a new problem.
What else can cause bad sensor drying
- Loads that are too small to contact the sensor bars.
- Mixed heavy and light fabrics in the same load.
- A clogged lint screen or vent.
- A dryer that isn't level.
- A failing sensor or control issue.
Good maintenance rhythm
- Clean the moisture sensor every few months if you use dryer sheets or whenever auto dry starts ending too early.
- If cleaning the sensor doesn't help, check airflow before assuming the electronics are bad.