I've used the first tip to clean up 4 manicures, with 4 different shades/colors of polish. The polish DOES stain the tip BUT it doesn't affect the colors on my new manicure. I thought it will like other products, but it didnt. Also, the remover in the pen is potent and works quickly, like you don't have to rub it back and forth much over mistakes before it completely removes it/them. Also, as someone who's got sensitive skin, it's really good since it didn't cause any irritations to my skin.