Very kind ball python now bite me every time I took him out of cage

[Bogertophis]

Not sure why he's biting you, it's a little difficult for me to piece together your whole situation.

As for shedding though, my place has low humidity as well. When my python begins its shedding phase, I take a towel and completely soak it in warm water. I then twist the towel to get as much water out as I can. I'll place the towel on top of the cage so 3/4th's of the screen lid is covered. I still leave 1/4th of the top of the cage open for fresh air flow.

I'll do this when I wake up in the morning and before I go to bed. She fully shed's for me almost every time.

Just make sure you don't cover the entire cage with the towel so air is still able to get in and the humidity doesn't get too high.

Actually that's a very ineffective way to add humidity, so you've been lucky. Enclosures are heated & heat rises- up & out, taking humidity with it. If you want to retain humidity, you need to restrict MOST of the air-flow, with something that air CANNOT go thru. Hint: NOT a towel, wet or otherwise. People use plexi-glass, foil, wood, tile, cardboard...anything air can't go thru, & only leave small gaps for fresh air. (You can cover the whole cage with a damp towel- air still goes thru. ) Better ways to increase & retain humidity is using the right substrate (one that retains moisture) & providing a humid hide.