So I really like the Vinylux line from CND. A lot of my customers love it. I'm having issues with the polish getting super thick after only a few uses. (example: relatively new bottle of Tropix was practically the consistency of pudding when I went to use it.) I'm always careful to clean the tops of my bottles off and close them tightly, so I'm not sure why certain colors get thick so quickly. Anyone ever use gel polish thinner? Wondering if it compromises the formula of the polish.