Unlocking the entrance door for MIWA EC.LA key not to enter

"Unlocking the entrance door"

I was told that the client could not insert the key. I certainly won't go in. As a normal work, I washed the cylinder according to the procedure, but it seems that there is no improvement.

Therefore, I decided to do a normal thumbturn from the door scope. There is a limit to the disassembly and cleaning of the EC cylinder.

Even after disassembly and cleaning, there was no improvement. Even if I look through the scope and check it, I could not see the foreign object.

In that case, it would be necessary to replace the cylinder, but the client decided to make a complaint to the management company about deterioration over time and have them replace it at a later date.