I'm looking for hacks for cleaning our frankly disgusting bathroom. It is fully tiled so there's a lot of grouting, which isn't too dirty but could do with a shine up. The worst part is the shower cubicle, I need something effective to clean the glass doors (deep clean and then ongoing) and the horrible brown stains on the shower tray. I've tried the standard Flash / Cilit Bang type products but they're not shifting. I remember reading something about leaving bleach on toilet roll overnight?!