I used this method and it worked great. I did them on the vehicle, then removed them to fill, bounce and re-fill. The plastic bag is hard to remove UNLESS you move the tire slightly wherever it is binding. I thought I was going to have trouble getting the bag out, but just kept rotating the wheel and pulling the bag out from the bottom each time worked great. Pretty easy method. I thought I would skip the bag for one wheel. After about 5 minutes of suffering, I went back to the bag and it makes a huge difference!!