Hi Everyone,
For some reason, every time I try to lightly clean the grouphead on my Oscar, it creates this problem where the portafilter will no longer lock into place securely. I'm pulling my hair out! I've carefully inspected the rubber gasket, and it looks to be intact and seated properly. I've done nothing whatsoever to the portafilter. It's a complete mystery to me! It works just fine when it stays grungy, but that's totally gross! Usually, I can work it back and forth, and it'll eventually go back to how it was before, but when cleaned it yesterday, it was the worst yet. It wouldn't move more than about 3/4" towards 'locked'. I know I'm not supposed to backflush it, but I occasionally use the blind filter to just loosen the grounds from the screen and the track where the portafilter goes. Is this wrong? This last time, I felt the exact moment when it changed. I was moving the portafilter back and forth slightly, but not enough to lock it in. It suddenly "grabbed" the portafilter and sucked it to the grouphead, and then it was really hard to get it off. Afterwards, it would barely go back on and lock in. I know this is a popular machine. Has anyone else had this problem? Any tips on safely cleaning the grouphead?
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