If you do not pull the brush out right from the bottle and get the neck of it clogged with polish it will create air gaps and your polish will dry out much quicker. You should use an upwards sprial motion to clean off the wand of the brush then clean off one side of the brush on the inside of the neck of the bottle.
Similarly if the neck of the bottle is clogged you will be contaminating your polish with bits of dried polish.
other nail polishes may not dry out as quickly this is true, but then no other nail polish drys in 8.5 minutes , we can't have it both ways
it's quick drying so this trait is inevitable
I stock over 100 nail polishes for retail and have never seen this happen, my polishes only go clumpy when one of the girls in the salon has borrowed it
arggh !
the cost of the polish is so reasonable that I never keep it once the level of the polish is below the word Vinylux in the bottle ( about half way down) I just chuck it and get a fresh one , I don't believe it's wasting the polish as I believe that every customer should receive the same level of service and you get a much better finish and long lasting result with the first half of a nail polish.
if your just starting out and know you might be a messy painter , rub a little bit of Vaseline or solar oil into the threads at the neck of the bottle and open and close the bottle a few time to transfer it to the inside threads of the lid, it will help with clogging