Did you ever try an oatmeal water bath? Don't.
3 seconds sound clip from the Midway (1976) movie soundboard.
You can hear this line at 00:40:56.629 in the Blu-ray version of the movie.
Quote context
[...]
- Sounds like a prayer, Mr. Wold, but it's damned appropriate.
- I can't sleep. I can't eat. I just sit around scratching myself, 24 hours a day.
- Did you ever try an oatmeal water bath? Don't.
- I want to thank you for recommending me to take your task force to sea.
- Now, I have a question for you. Did that itch go to your head?
- Stop underestimating yourself, Ray.
[...]