I saw this floating around last week and the image has been on my desktop for a while and the more I look at it, the more inspired I think it is. I don’t know who thought of it, or who I can credit, just one of those legendary shared images. I’ve managed to collect two old toothbrushes and will be putting this idea into practice and see what the outcome is. What I really like is that DIY solution to a real problem of cleaning a dirty chain. Anyone else tried this?