Technically not Good Housekeeping but thought this was the best place to ask. I have a child's bike (bought for a 3 year old girl). It was hardly used and I want to sell it but the white tyres are really grubby. Only went out a couple of times so don't know how it got quite so bad.
I tried scrubbing it with detergent and then some detergent mixed into a paste with bicarb but it didn't shift. The dirt seems to have been absorbed into the rubber/plastic itself. Is there a product out there that could clean it? I wondered about painting something on like trainer whitener. It's in really good nick otherwise but I don't think anyone would want to give it to a child as a present with such dirty looking wheels (it's a vision in pink otherwise!)