Check for poppy seed looking bugs in the water dish (mites) double check everything else as well, tempertures make sure they are 80-84 and 90-94, make sure your humidity is between 50%-60% and make sure both your hides are tight and identicals (all side's touching it's body)

Healthy BP with proper husbandry that are not overfed rarely soak so you need to try to narrow it down and find out why your BP is soaking.