I have a new OM guitar that I made. The height of the saddle over the sound board is a little under 5/8 inches on the base side and a little under 1/2 inch on the treble side. The problem is that the greater tension on the base side is causing the saddle to be twisted and splitting between the D string and the G string. I have split a bone saddle and a Corian saddle. The saddle thicness is around 5/64 inches. This is a premade bridge that I purchased. Any solutions?
The problem likely rises from the saddle slot. You don't mention how much saddle is exposed vs. how much is slotted into the bridge, but if there is too much saddle exposed relative to the amount in the slot, and you have a thin (5/64 is very thin) saddle, and/or the bottom of the slot is not perfectly flat (a small bump, imperfection, differentiation...), no amount of unbleaching will save your saddle.
I think you need to re-route the slot.
Everett, how about some pictures. What brand guitar also?
Everett made it himself. Don't much care for Tusq, but YMMV.