What do you use to clean that stuff out of them?
Using Meg's Hotshine Tire Spray.
Soaked them in Simple Green and water, but I really had to scrub to get the black off the handheld part.
The residue in the water shows globules. lol

I use dish soap and warm water.

What do you use to clean that stuff out of them?
Using Meg's Hotshine Tire Spray.
Soaked them in Simple Green and water, but I really had to scrub to get the black off the handheld part.
The residue in the water shows gobules.

Using Megs HotShine I use a 1 inch paint brush to apply as I have not had any success using using sponges.

Just keep scrubbing!