I will take a paper towel or two, completely wet it down and toss it in the cage. I use RO water and my substrate is microfiber towels. This will raise and keep humidity before the shed process. I generally do it as soon as I notice the cloudy eyes and then taper it off the next day or two until they shed. Bear in mind this is only during dry times.

Works well for me and I have never had to deal with eye caps or shedding issues. Of course, they always like a great soak.

In winter, which doesn't really get too cold where I am at, I can attach more heat strip tape to the sides of the cage to raise ambient temps. I prefer not to use heat lamps. I use a porcelain bowl for the water and I place it directly over the hottest part of the heat tape under the tub, it helps heat the porcelain and produce a tad of stable humidity.

These are really things that are hard to copy since everyone's home is different. Best advice is to play with your set up until you have have it down.