If your float is riding straight up and down or even angled back into the current then your jig is not on the bottom and you can adjust it until the top of your float is pointing down stream ( the jig is now touching bottom) when that happens you'll want to adjust it back up, to get into the right position.

Steelhead, salmon and trout don't grub around in the muck, they always look up to the side or straight ahead.
Watch the angle of your float, as simple as that.
cool