Its true that most do not like it when you mess with the head. Just hold the snake firmly behind the head with a dab of that stuff on your finger already (or like the other poster said, mineral oil works too) and quickly rub it on each eye. The snake will not like it but it only take a couple seconds to do. Once a day from the moment the eyes go cloudy until it sheds.

Take a tupper ware container or something similer and fill it with moist bedding. You can use something deep enough to put the lid back on and cut a big hole in one side if you want. Coconut bedding or any shredded moist reptile bedding other than aspen. Aspen will mold very fast. Put this in the enclosure on the warm side during shed. Most snakes love these humid hides and they work wonders too. You can put it in there during the shed cycle and then take it out so the snake is not in 100% humidity all the time. I just fluff the bedding in it when I take it out to let it dry. Check it for mold or snake poo every time you put it in there. Just change the bedding when its dirty.