Bloods & STP's (Borneos included) with optimal humidity will typically shed in once piece. Does that mean it happens every single time? No, but the vast majority of the time you shouldn't have retained sheds, and it doesn't need to be a stressful process for either you or your snake.
It sounds like you have your temps dialed in well. Keeping your snake on slightly damp cypress mulch for the majority of the time should be OK, provided that you don't have too much ventilation going (sounds like there are a lot of holes in that lid?). Check on your python routinely, and when you see her going opaque, mist her with a spray bottle in the morning & in the evening to bump the humidity up in her enclosure. No need to drastically soak her down as cypress does hold moisture very well, but you do want to see the bedding change color - a shade or two darker is fine. Keep this up until she sheds & you should see a significant improvement in her sheds. It's OK to let the bedding dry out quite a bit in between sheds, as you don't want her sitting in a swampy enclosure with too much moisture. Slightly damp cypress works well, and make sure you mix it up well if you do need to spray it so that the moisture is distributed throughout the bedding.
In the future if she's having a tough time shedding, try putting her in a shallow soak for several hours. Place her in a plastic tote with water that is only deep enough to come 1/3 of the way up her sides. She doesn't need to swim. Make sure she's in a warm spot (but that there's no risk of her overheating), and leave her for several hours or even overnight. You should have a nicely-shed snake in no time, and it's a low-stress experience for you both. I've used this method time and again with a variety of species over the years, and it works like a charm every single time, even on annoying stuck skin on the snake's head.
Hang in there & good luck!!
K~
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