[Womble]

When I was an impoverished student, I made yoghurt by mixing some shop-bought yoghurt with evaporated milk and the same amount again of boiling water, then stuck it in the airing cupboard overnight. It never failed!

However, I've tried again sporadically over the past few years, using an easiyo maker, my Mum's old electric one, and latterly an instantpot, but nothing seems to be reliable!

I've so far made curdly mess, accidental cottage cheese, rancid milk and various other failures alongside rare successes, but I just can't seem to get it consistent any more.

HELP!!!