MIWA PR.10PGF713, the key won't turn or come out

"Key removal and cylinder disassembly cleaning"

It looks like the key was forcibly inserted. He said that he had been concerned that it had not been working well lately, but he was able to use it somehow, so he left it as is. Apparently this situation suddenly happened this morning.

The door was locked, so in order to disassemble it and clean it, I had to unlock it and remove the key.

I was able to get it to turn by spray cleaning, but I can't get the key out. After a few minutes of struggling, I managed to get the key out. The next step was to disassemble it and clean it, but the core cylinder was removed and it was white and dirty. It looks like a used cylinder was installed as is. This is a terrible story even though the property is only 6 years old.

We were able to improve the problem by using a special cleaning lubricant spray for the core cylinder.