Stylus cleaner

The best is Audio Technica AT-637.

Mr. Clean Magic Eraser. Lower arm into eraser and lift.
Works great

This looks like it should do the trick.

I have a similar carbon fiber stylus brush that I have used or years. I think it is the old Discwasher brand, but not even sure. Extra bonus is its all wood, encloses into a case to keep clean, all one piece and has magnifying mirror on the rear side for inspecting stylus condition when needed. Perfect if you can find or make something like this still these days.

Like This if any still around.

Magic Eraser is what you want. You lower the stylus into the foam. The strands of melamine that make up the foam matrix surround the diamond and gently scrape off residue as you lift the cartridge straight up from the foam. Very effective. Never scrape the stylus only dip into the foam from above. It is the verticle motion that cleans and is safe. Dragging the stylus across the foam could allow for the very strong strands to remove the diamond. Only straight up and down. Under my microscope the diamond is cleaner than I ever was able to do with fluids. I do use a brush after the ME dip since the foam does break down a little over time and from multiple "dips" and any residual powder does not need to be scrubbing my albums. One box of original ME (no soaps or additives) could last you a lifetime. Do not get it wet. Water collapses the foam matrix and it is no longer effective for our purposes.

magic eraser does not sound like a good idea off the cuff, but have never tried. Potential to damage stylus? Does it really work to dip? No residue from the ME itself?

My wife loves them and uses them for everything though.