Making Jam with Frozen Fruit

[red]

I steralise my jam jars by filling them up with boiling water and lettig them stand while i make the jam.
always worked for me

[possum]

Ooh does this mean I shouldn't have used a jar that had sour cream in it? Surely washing it, putting it in the oven then filling it with boiling jam shoud,do it?? Should I throw that jar??

nooo, i didn't mean that, i was listing the stuff you yourself were going to put into it, not what was in it originally. Glass is easily sterilised no matter what was in it originally, chuck it in in boiling water for 5 mins will kill off anything that has a hope of living.