Why are my liquids hardening?Updated a year ago

A: Dip base coat and Top coat harden from contact with step 2 Activator, moisture(water), or long air exposure. Cross-contamination can happen from acetone getting in the bottles during cleaning, leftover Activator getting on a Top Coat Brush, or dip powder getting transferred to Base coat bottles. You should also avoid exposure of liquids to air for long periods.