Cover those sides, she's feeling naked

With tanks it's best to cover 3 sides so the snake isn't so exposed to the scary world out there that we humans live in. If the snake only has to watch out one side of the tank it will feel more secure in the tank.

Anytime I catch a snake soaking I run through my list...

1. any mites in the bowl?
2. Double and triple check temperatures and placement of probes.
3. Is snake in shed.

If none of those then the snake is probably just enjoying the water and may need the extra humidity.