Not a lot of crews are a fan of relying on something you can’t jerry-rig, especially when it reeks. But a Scrubbie nestled by a heatsink can make long hauls a bit less stuffy. They can be a bit fickle, gotta feed the lil’ shits on a strict schedule and they happen to have a tendency to detach themselves and float around leaving you to sniff them out. A sprinkle of sweetener is all they need to recycle some of the c02 scrubbing the air to technically be cleaner, but the process reeks of ass gas and that's with natch sweeteners. In a pinch, any synth sweetener will help it get through a cycle or two till you get something better, but you best be prepared with sick bags.