This product is amazing. I bought it as i had some dark areas on the silicone seal around my bath and i'm selling my house so trying to make the place look its best.
I tried this and Oh my god! i LOVE it! i've used it practically everywhere in the bathroom and the angled applicator is brill doe getting in to grout on your tiles.

i'm not usually one to review products but i had to with this one!

Only problem is - where i left the product on the grout it drips slowly down the tile leaving slightly lighter marks (bleach stains) they looked white to me but this showed me the tiles needed a darn good scrub-a-dub too so again no complaints.

wouldnt be useful on larger areas but for under taps, grout, silicone and other grimy areas i think its brill. and reading that i can get it a £1 shop is even better!!!!