Review (5/5): Follow directions.
To be honest I had used something similar before and left on for 2 hours and didn’t think it was enough time, so this time before bed I put them on over night. It took about 3 days to start peeling but than it was hard to get ALL the peeling off. Went about a week of attempting to remove the product. So my bad that I left on way more than 20 minutes, but my feet do look and feel better. Just follow directions.