When I place fresh moss in my cages I will use a glass and get water in the range of 75-80F and submerge the moss in it. I then pull the moss out of the glass and give it a light squeeze before placing it in the hides.

If the moss is already in the cage I simply bring the glass to the tank and either dip it to soak it or just pour it on the moss. I have live plants and cypress so I regularly pour water in the cage to water the plants.

I don't remove the snake for any of this.