On my second keg. The first keg I had no problems with staying at one presure all the way through. The second one held 15 pounds of presure while carbing for a week and a half. Now that I am drinking out of the second I can't get it to stay at one pressure. If I put 5 or 6 pounds on it and leave it it will hold that pressure but when I start pouring beer it just drops in pressure and I have to turn the co2 up to get pressure back into it to pour. I have checked for leaks and nothing. Is this normal or am I doing something wrong. Thanks for the help.