You can always push a little firmer if you can tell it is not cutting the hair. Depending on the amount of hair on your legs, you will only be able to cut an inch or two without rinsing off the razor. After the first time, the hair on your legs will not be nearly as long and you will be able to shave larger areas without rinsing. If the razor doesn t seem to be cutting, check to see if you need to rinse the razor or push a little firmer. Continue up one side of the leg, then begin at the bottom again at a different place and start the process again.
Many people only shave up to the knee.
Be very cautious if you decide to shave the knees. Don t press too hard or you will get cut. The best way to find out if shaving has worked is to feel with your hand. It should be smooth and soft. After finishing one leg, repeat the process on the other one.