ALPHA FB.85RA cylinder cleaning repair

"The key doesn't stick all the way in, it's hard to turn"

This has been happening since a few days ago.I didn't think that the stainless steel cylinder had deteriorated over time.

Since the FB cylinder has a delicate structure, we often encounter this phenomenon due to dirt.

There is no need to disassemble it, so I usually sprayed it for about 10 minutes to remove the dirt, and the work was completed.