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I've always found that a dry swab is better than 99.9% IPA. Liquid gets contaminated as soon as it touches the dirty surface. Smudging it around doesn't make it any better. So, maybe a damp swab to get some of the debris free, then a dry swap to clean it off.slingshot":36kam7gv said:I'm getting poor results from using 99.9% IPA, it definitely leaves residue on the platter that leaves weird blobs around the sliders. After reading this thread I'm not going near Novec so I'm gonna try the acetone route with the lens wiper or a swab, and see if that gives me better results.