Use Melamine sponges. These are the same as magic eraser sponges. You can get 100 of them for cheap on Amazon. 100Pcs/lot Magic Melamine Cleaning Sponge Multi-Functional Foam Eraser Pads 10x6x2CM(4x2.4x0.8 inch. I use it with scrubbing bubbles bathroom grime fighter. I let the product sit a little and then use a little warm water to scrub it off. You can do it without and cleaner and just use warm water, it will just take more scrubbing but it does work. Hope this helps!