REVO Black Marks on rails. Wonder why?

I normally use a black glove but at the expo I bought the predator glove that the palm is grey. After a month of play with it I realized it had black marks where the cue touches my hand with a closed bridge. I hand wash my gloves and it came right out but it was there.. I haven’t noticed anything on my cloth though.

I have to keep several gloves on hand in my case to swap out due to the black smudges if I'm playing for an extended period of time. I've cleaned the shaft countless times with alcohol. I continue to get black smudges on my glove, and they feel gritty while I'm stroking. I use Meguire's Ultimate Quick Detailer to seal the shaft, and it helps but only lasts so long before the smudges start again. I just washed all 7 of my gloves, but I'll take some pictures next time and post them to show everyone. It's really the one thing I absolutely hate about the Revo. Might try the Ignite.