If you like to wear dark colours on your nails then chances are you occasionally get left with some staining when you remove your polish. Prevention is better than cure, so try to wear a base coat before you apply dark colours like red to your nails. However, if you are left with some staining then try this tip – cut a lemon in half and dip your nails into the fruit for five minutes. The citric acid will lift staining and brighten your nails.