Seems like I’m on here too much lol but I guess that comes w the territory of owning a FJ60. Anyone see this before? I haven’t. I just recently had to add a bunch of fluid due to my radiator hose cracking. Put a new hose on and added a few gallons of antifreeze. That was about two weeks ago. It’s not having any issues but it’s been sitting about 5 days and I decided to open the cap and see this on the inside of the radiator cap