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Sorry to hear you had such a bad experience. I personally love mine. the first on I had problems with because I didn't tighten it up after heating, that was my fault. Since I followed the instructions to the letter, mine has worked flawlessly. I have at least a couple of hundred hours of prints on it. I did have some clogging happen at the start, once I lowered my retraction settings to about 1 mm as the recommendations or 1 - 2 mm, I have never had a clog. I have found that once set up correctly it gives me a lot better prints as well.