Help with a leaking hose

[Sr. Lapiz]

what do i do.????
i just recently took out my hose that connects to my ASA bottomline adapter. now my CO2 always leaks slowly from the conection between the hose and the bottomline. I belive i know why but i do not know how to fix it. I think it is because there was some rubbery "stuff" around of the hosepart that screws into the bottomline and some of it came off when i unscrewed it. What do i do?

[Killers Are Quiet]

I use polytetrafluorethylene antiseize tape:)
some people call it plumbing tape. you should be able to get it at ACE or a store like it. It's white and I use the 1/2 in. or 1/4 in. width. wrap it around the screw in part and snug down the connecter. JUST slightly tighter than finger tight works for me.
Hope this helps