I've been reading about TC for ages but, up until now, haven't had a go at it.
On the weekend a friend gave me a number of demijohns he didn't want and, after using up all of my frozen fruit from the allotment for wine, I decided that TC time had finally arrived.
I want to Sainsbury's, got 5 litres of their basic apple juice (made from concentrate, no preservatives listed) and threw 3 of them into a DJ along with about 50g of sugar & the last of my wine yeast.
I then waited, and waited, and waited. Nothing has happened

I know the yeast was ok as my wines are going strong. The DJ is in a nice worm spot & everything was sterilised properly etc.
I've tried giving the DJ a vigorous shake to get some oxygen into it (can't remember where I saw that suggested) but nothing.
Can any of you make any suggestions as to how I can get the happy sight of the airlock bubbling away along with the wines?