Sorry if this should be in appliances but it seemed mor a gas pipe q. Got a free standing gas cooker with a rubber hose, brass bayonet on the end. Its very stiff to get in and out of the bayonet socket, is there a lubricant I can use that wont attack the brass and is safe for gas? Also I'm getting a new cooker soon, again free standing and I was going to get a new hose for it, the existing one is donkeys yeas old. As fitting this to the cooker doesnt involve sizing or installing rigid pipework or soldering joints or anything to do with flues that could leak or poor combustion that could poison me etc I plan to fit it myself. I know to get the right sort of hose (NG), and to use proper leak detector not fairy liquid. Do have 1Q though, what should I use if anything to seal the connection at the cooker? Current one looks like they used Hermetite Red and who knows maybe they did but whats the right stuff?