I spoke to FL when I bought mine and they said any degreaser will work. They recommended Simple Green cleaner. Has worked well for me.

The other day my RO asked what the hell I was doing sniffing my gun. Yes, it was safety checked, empty, and pointing down range. It's weird to smell mint on a gun but the cleanup is FAST. I just put a little liquid FL on a boresnake, passed it through the barrel, and wiped down the gun. Done!