Polish: Save or Toss?

Recently I was watching one of my fave youtubers, and she had a vid on nail polish thinner and how long you can keep polish before you should throw it away. I've had some of my polishes for 6 or 7 years and they are still good. After watching Simple Little Pleasure's Vid on saving polish, I decided to head to the local beauty supply and grab a bottle. I found some polish thinner for about $3.50 and it contains 4oz. Since you only need a few drops for the average thickened polish, this is so much cheaper than tossing your polish! Luckily, I had a great coupon so I was able to get two bottles of polish thinner for less than the price of one bottle. I tried it on a bottle of polish I had that was getting a little thick and all it took was one drop and the consistency returned to normal. I highly suggest this product as a cost effective way to save your polishes.