One more option- IF there's enough room for 3 hides (& you could remove or re-install the fake plants over or between the hides): you might consider just using a dry substrate, and adding a good humid hide, which you can either buy or make one yourself, easily. The humid hide would be placed in the "middle", not the coolest & not the warmest part of the enclosure. And most snakes seem to love the option- it really helps their shedding & they seem to know when to use it, but instead of keeping the whole enclosure so moist, the humidity is contained.
In the past, I've used some of the same product as you did, & in order to rehydrate it, it gets awfully moist & it's very hard to control that. No wonder you have so much condensation.![]()