Messaged MM about some some burning behind the ballsack, and they recommended baby oil gel! Was using coconut oil for a while, but it get's absorbed relatively quick. Baby oil gel is super long lasting, and helps my jailbird be way more comfortable! just wanted to share the tip here!
With a JB it might be OK. In general avoid any lubricant that is glycerol/glycerine based especially in a full plastic cage. They decompose, as an they are organic, and will harbour all sorts of nasty stuff with the heat and dampness. Best to go for a silicon based lube.
Im using vaseline (healing jelly) myself. works miracles for that cremaster muscle retractions that happen EVERY morning.
I use 2Toms SportShield, All-Day Anti Chafe and Blister Prevention, Waterproof Protection from Chafing and Skin Irritation. It is silicon based, and is a convenient roll-on application. I use it morning and night with no problems and it works great with my MM Jailbird. https://www.amazon.com/gp/product/B01L7UUDEO/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1
that looks cool. i'm using Swiss Navy silicone lube. it's pretty good, but a little on the thing side and pricy !