Long time glasses wearer, got my first plastic frames a couple years ago and learned quickly that not all will sit on your nose properly. So glad I found these!A couple of points I've learned from using the GMS Optical brand of nose pads:1. Clean your frames with non-oily or non-residue products before putting the pads on your glasses. I like to use an alcohol pad then I wipe with a damp paper towel and let dry before putting on a fresh pair. Any residue on your frames will cause the adhesive to breakdown faster.2. You get a better (longer) attachment if you do not touch the adhesive when installing. I use a pair of tweezers to help position them.3. They are NOT permanent. You will have to replace every so many weeks/months depending on things like how oily your skin is, if you sweat a lot, makeup usage, etc.4. Make sure to position them evenly/at the same height to ensure your glasses sit evenly.5. The gummy-gluey back will start to pill up the longer you have them on. This is usually an indication that the adhesive is wearing down and your pads will soon need replaced.6. Do not use alcohol based products to clean your glasses as it can get on the pads and start to break down the adhesive. I use warm, soapy water and a cotton cloth to clean and minimize scratching.If you have read this entire review, thank you! My work is slow in December, so I use the time to review my Amazon purchases, which helps fill the time that I am required to be at the office instead of home curled up with my dogs.