Dry skin is a part of hypo T; Your skin dryness may be a part of the detox phase, or of course it could be boron or any of the other supplements. took them off my program, one by one to see what caused it.
In general; borax can be drying to the skin, taking it every other day or reduce the dosage to half can be the fit level for you.
The frequent urinating is IMO a signal of not enough salt or a detox symptom. You are early in, this will take time; took a year or two for me.