I have some nice red wine some two years old,and kept in 1 gallon
demijohns with a rubber bung tightly put in at the top.I have heard
that this method of closing the wine is not good,since eventually (on
a hot day for example)the rubber bung starts 'leaking' and letting in
air.In the first year I used an air lock bubbler,and assume this was
fine.Is there an easy way to make sure the demijohn is fully sealed
say by using a piece of plastic between the rubber and glass or would
this leak eventually.I would appreciate some advice.
Regards,Michael