what causes nail polish to bubble
Bubbles are caused by air trapped under the polish that rises to the surface as it dries. You can minimize bubbling by cleaning your bare nails first with polish remover to remove any traces of dirt or oil that could prevent polish from adhering properly. Then be sure to always use a good base coat. If you have ridges in your nails (like me!), be sure to use a ridge filling base coat, since an uneven nail base makes bubbling more likely to happen. Finally, don't use old or thick polish. It's almost guaranteed to cause bubbles!