Mul-T-Lock.LAMA Cylinder cleaning and repair to prevent keys from getting stuck

"I can't put the key in."

It seemed like the key wasn't working at all. In the case of the Mul-T-Lock cylinder, the frictional force with the pin is large. Due to its complicated structure, it always feels like it will get caught.

The problem was improved by cleaning the cylinder, but it was still quite dirty, so if it happens again, it will need to be replaced.