How often should you change your primer? I know it can get contaminated with bacteria.

Doug Schoon: You will be happy to learn that bacteria cannot live in many nail products, such as primers, liquid nail monomers, and polish. These products are considered to be “self-disinfecting.” This explains why sculpting brushes don’t need to be disinfected. You should change your primer if it becomes cloudy. To prolong the shelf life, keep primers in a coo, dry location, out of direct sunlight…and OUT of the reach of children, please!