After my cider not carbonating in my pressure barrel (a brand new Balliihoo) i decided to transfer it into bottles last night, the thing is there wasn't even a hiss when i removed the lid so im guessing there must have been a leak so no build up of pressure and hence why i have no carbonation. Has anyone got any tips for sealing, i did put a smear of vaseline on the lid before i fitted it but i put it on really tight, can you over tighten them?