Here are some photos Imgur: The magic of the Internet
Looks like a little nute splash or water and a touch of WPM. 50/50 water/peroxide in a spray bottle. Spray down before lights out or sundown.
It could be nutes, I’ve been using a little pump spray and it’s been kind of windy. I also so a 9 part water & 1 part alcohol spray a few times within the last two weeks. I told myself it could be the sun hitting the water spots or maybe a little nute burn. I’m going to do the 50/50 for the wpm we’ve been getting a good amount of rain with high heat in Michigan.