I had these from IW in the past and found more did not set than those that set.
I tried hot water in the mix and boiling in the tub. Even replaced the water 12 hours later when it had not set.
No luck, I even put half the water in the pot with the culture again no joy.
I was told on this web site about http://www.yoghurtdirect.co.uk and have not had a problem since using them.
I can only put it down to the quality of the product supplied. To get the price lower quality goes out the window.
