I’ve dealt with this before and you’re not crazy. It happens more often than people think. Water can look clear and test fine but still not feel great when you’re swimming.
In my case it was usually a slow buildup of sunscreen, body oils, and other stuff that doesn’t show up on test strips. It just hangs in the water and makes it feel kind of heavy or dull even though there’s no smell and chlorine looks normal.
What fixed it for me wasn’t one big change. It was a few smaller things working together. I started using enzymes consistently each week, brushed the pool more so the filter could actually catch the fine stuff, and ran the pump longer for a bit to help everything cycle through.
Any enzyme product can work if you stay on it. A couple people mentioned AquaDoc and that’s what I happened to use, but the bigger thing was sticking with it for a few weeks instead of expecting an instant result.
When it starts improving, the water doesn’t really look any different at first. You just notice that it feels better when you’re in it.