The fact that you asked the question shows that you are concerned about your geckos' welfare.
Leopard geckos need constant access to a humid hide, not just when shedding.
Making one is easy, almost any small plastic container with a lid will work well. I like to use Coolwhip containers with an entrance hole cut in the side about an inch to 2 inches from the base, the high hole is for adults and the low for babies; I'm not sure what size your guys are. You then fill the base of the container with a moist substrate such as paper towels, vermiculite, or bed-a-beast (what I use). Open the lid and rewet the substrate as needed to ensure it stays moist.
I'd recommend placing the geckos in a humid hide and "locking them in / block the hole" overnight to see if they can remove the skin on their own. If they don't, you will have to intervene. Moisten their feet and use a pair of forceps to carefully remove the skin; great care must be taken not to injure their toes in the process as trauma can result in the loss of the digit. If the skin is left on it will restrict circulation and the toes will eventually be lost.
Hope this helps,
Alice