I have a surround shower and tub and it looks dirty, how to make it look new again?

you have to try the Mr. Clean Magic Eraser! I have used it safely on my porcelain sinks and white tile floor, and it brightens and cleans without scratching surfaces or leaving a residue. Good luck!

Try a 50-50 dilution of vinegar (apple cider or distilled) and water in a spray bottle and sprinkle baking soda over it. Let it fizz for a minute and scrub off with a damp sponge. It totally removes the scum and leaves a shine afterwards. You could even use the vinegar-water dilution for your bathroom mirrors and windows with a piece of newspaper for a clean shine!

Hopefully it is just hard water causing your problems. If so try Lime Away. The newest version is improved especially for baths.

i moved into a rented house and the tiles had mould all over them. i used cillit bang grime and lime.

honest to god it looks brand new now. it took a while with a toothbrush but that stuff is amazing!

i recommend it and its reasonably cheap!