Crunch when clicking on the right trackpad

After gluing the vinyl film on my steam deck with a hairdryer. I noticed that when you click on the right trackpad, it crunches. It works absolutely fine (if believe the steam calibrations), but still the crunch when pressed is a little annoying. I also noticed that there is a blow of hot air (you can even just out of your mouth), then the problem disappears for about half an hour