I am starting to get my periodic reminder from my spouse that I need to do something about the grunge in my shower, I guess it’s that time of year for it to start building up.

I can do the soap scum easily with squeegee and vinegar, but there are some residual stains from I suppose oil and grease and all the other stuff that comes out of the farm shop.

Any advice on brush heads I could use on a cordless drill or such to scrub?