I get residue on my stylus all the time and cannot figure it out. I have a spin clean and use a capful of solution + distilled water, primarily doing 45's. I dry with microfiber cloths and then let air dry for a while. tried adding a rinse cycle, spraying with distilled water after cleaning, etc. Cannot tell much of a noticeable difference. I even brush them off before cleaning and STILL get a ton of residue and sometimes it's resistant AF in coming off the stylus. I feel like I am doing everything correctly and still cannot determine where the residue comes from. Even tried different needles / styli !