I have noticed that, every once in a while, I feel like my golf hard disk has been reformatted. What I mean is that I start hitting the ball like I have never swung a club before. I make good progress during a few practice sessions then go through a session where all goes bad. The next day, all is ok. Suspect it's that ugly hit reflex coming back to haunt me.

Does anyone else experience this? If so, what do you do?