Bought this from an Instagram ad. I didn't believe that this would work but was willing to give it a go as there doesn't seem to be anything in the supermarket that works. I truly thought it was just good advertising and there was no chance it would work.... But oh my god, I am in disbelief. It got the mould out of the silicone in the shower. What kind of black magic is this?! The instructions said to make sure the area was well ventilated, however the product didn't smell at all (unlike Exitmould or bleach where you have to have a gas mask on to use them).