When outdoors, I watered the day after I found it dry, if I found it in the afternoon. If I found it in the morning, I watered before dark.It's still plenty moist in there for that short of period. I also use a tiny bit of fully soluble humic acid in every watering.How long do you let the rez sit dry? I have been in and out on the BAS videos; but must have missed that one. I've been doing about 1-2 days generally between empty to refill - just as a shot in the dark.
If you have done any top watering, you may have washed some nutes into the rez. That may have forced an uptake of some nutes. That's what I love about EBs. If you keep nutes out of the rez, they tend to just take up water and the plant can get what nutes it needs and not so driven by VPD.
In my future EB grows, I'll water as soon as I see it fully dry. I'm pretty sure that will give the same results.