Sanding belt cleaning block - GIF

Sanding belt cleaning block.

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Previously:

https://www.homemadetools.net/forum/...340#post150553
https://www.homemadetools.net/forum/...795#post124364
https://www.homemadetools.net/forum/...874#post186885
https://www.homemadetools.net/forum/...672#post182637
https://www.homemadetools.net/forum/...715#post170725

Any old rubber footwear such as a thong will do it also

I've known this trick for decades, I've worn out at least two, maybe three rubber erasers...

I have a slug of silicone that had cured in the tube and has lasted for years.