Xtra nail polish remover and Mirame nail polish remover.
Xtra is my favourite because it's the most effective and also very affordable but sometimes hard to find in store. So sometimes I buy the Mirame one if I can't find my favourites. It's fine but it's not as effective as some others.
I always have nail polish on so I go through several bottles of nail polish remover a year.
by _Yue_