Please help, I have been a bio sculpture nail tech for over 14 years and have noticed recently that a few of my clients are having problems with air pockets in the centre of the nail when I buff off the colour layers. I am using the most recent uv/led lamps and haven't changed anything with the prep or application, it's taking me longer to prep clients nails and I'm at my wits end, it's costing me more as it's taking me longer to do a set of nails than it should.