Day three smells like nail varnish, and that is normal
Days one to two
Flour and water, equal weights, stirred once a day. Very little happens and that is correct.
Day three
It will smell sharp and unpleasant and may rise dramatically. This is the wrong organisms and it passes. Do not throw it away.
Days five to seven
The smell turns yoghurty and the rise becomes predictable. From here it doubles in four to six hours and is ready to bake with.
