I've had this for several years and it looks like it might last me quite a few more. One drop goes a long way. I've found using it right before you do your nails is not the way to go. You're just going to wash it off anyway and you'd end up getting oil on your nails before a coat. Use it the night before you do your nails or just whenever you have time for maintenance. If you still have some left on your nails before your first coat use nail polish remover to get it off so it doesn't ruin your nail job.