So it's hot in TX. Despite my knowledge and general negative attitudes towards the 5 is enough club and you are a commando nut for carrying a big old Glock and extra mags, I have wandered around with a G42 in a DeSantis pocket holster in cargo shorts. However, I do want an extra mag. In the box of forgotten crap, I found a small Uncle Mike's felt (or whatever) small pocket pistol holster. I think it was for a crappy Taurus PT-22 from many years ago (what a piece of junk). It would hold the G42 reasonably well and upright. I use it a bit in the 100 degree days. The other day I take out the mag and it feels really sticky. I look at the top round and it is covered with black junk. The mag was rounds down into the holster. I feel inside and it is all sticky. I don't down what it is constructed with but it sure made a mess. Had to clean it all.
Going to buy a better pocket mag pouch. Duh. My pocket gun holsters are DeSantis and no goo problems from them on the G42 or J frames.
So, maybe I will become an extremist commando type again and wear the 9mm and extra mag on my belt with a floppy shirt. Such decisions.