Why don't you take a bath?

I had a hard day, lots of data, many papers, many ideas crossing my mind, all ended in confusion, nothing was clear. I went home and my wife said why do not you take a bath? Under the shower, soaping me, suddenly, everything was fixed in my head. But this always happens to me, the best ideas come while I am taking a shower. It looks like someone did the experiment and found the same: