Hey you, as you know, I setup the "pool" for my blood as well earlier this week. I hadn't observed him going to it, whether for a drink or a soak, and I really don't think he found it as he's on cypress mulch so I can pretty much see which areas of the enclosure he's moved about.
Last night I took him out for some handling, and when putting him back in I purposely placed him in the pool. He poked his head above water level and just chilled there. After just a few minutes though, he slithered his way out and hid under the bark hide on the opposite warmer side.
He hasn't moved from that area since last night. So unlike your issue of possibly soaking too much...I'm wondering if my guy is too lazy to even go for a drink and/or soak!But after being placed in the pool last night, I'm hoping he's at least aware it's there as a water and/or soaking source.