Cages/tanks/ tubs can be side-by-side. That shouldn't matter, as long as it's one snake, one tank. Cosider covering 3 of the 4 sides of both tanks to provide more security, less movement distraction for the snakes. Do you have a properly sized, identical hide on each side? On one of my tanks, I've taped a black, plastic garbage back along the short ends and the back.

Hot side temp should be 92-94*, cool side 82-84* and humidity ~50%, boosted to 60-65% during shed. If there's pieces of old shed, wait until the next shed cycle and up the humidity. Old stuff should come off with the next cycle.

How long ago did U get your new pet? Give her a week to settle in. Then gradually handle her for short periods of time, but only after she's eaten consistantly for about 4 weeks. Balls aren't a "play pet" like some. Balls are timid and even tho' there are exceptions, most get stressed with a lot of handling.