Which practice helps prevent contaminating an entire product container?

To avoid contaminating an entire product container, the cosmetologist should remove product with a clean spatula or use a pump, rather than dipping a used applicator (or fingers) back into the jar — a practice called 'double-dipping' that introduces pathogens into the product. Once contaminated, the product can spread infection to every client it is used on. Practicing clean product removal protects the whole container and all subsequent clients. This is a routine but important infection-control habit tested on the exam.