The first one I cleaned took a year. It was hard to get any kind of info back then. I've done a lot of them - to really have them work right you have to spend considerable time cleaning them sooner or later. I have one some Egor smeared grease all over the place - I don't know what they were thinking. Then it dried HARD but it was a bargain... I had Miss L help me clean it. She was not impressed by the grease job. She knows better.