I am really slack, no sterilising ever or boiled water after 6mo.
Read the side of the formula tin and it will tell you what to do
BUT, I have always recycled the unfinished formula once, we also don't heat the bottle the first time and reheat in the microwave the second time around
and if it is not drank it gets tipped. I never leave a bottle out for more than the time it takes to drink, so always less than half and hour and never had any problems.
I make up all the formula scoops without the water in the bottles and leave them on the bench and then use a spare bottle I fill the right amoutn of tap water.
Whoo Whoo, I am on my last tin of formula... Sorry just had to say.
Edited by SMOKER, 17 April 2012 - 01:03 AM.