Plastic toilet and sink cleaning?
At some point filling it with water and dishwasher detergent and gentle rubbing with a sponge doesn't work. Resistant stains in sink after mechanical/painting/lubricating work, stains in toilet accum...
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We have had our camper for quite a few years and it has been used a lot including 2 years as full timers. Our rule has been no scrubbing on the toilet, ever. It is still like new. No stains. No scratches, very smooth and the waste just slides right off. One you scratch it, stuff will stick.
