DD is FFd after a failed attempt at BFing. She is now 5 1/2 mo.
When we first got formula milk, I read the instructions and DH asked me to show him how to make up the bottles. So I showed him. Water to whatever number you need, then add the same number of scoops of powder. Easy.
Then I saw him making some bottles powder first, then filling to the number needed, so 4 scoops, then water to the 4oz level. I explained that he needed to add the water first, then the scoops, to make sure the mix was correct and that yes, even though we want 4oz of milk, after the pwder is added, it will be above that.
He said he did it his way as the powder stuck to the spoon when making the bottles if he did it "my way" so decided to swap it round. I said it had to be this way, it wasn't "my way" that's just how it was. He said he would do it "my way" 
. I did say to leave the kettle water for 20mins or so, not use water just boiled as obviously there would be less steam so less chance of powder sticking to the spoon.
Months later, I've just seen him making them up "his" way again. 
Once again, I have asked him NOT to do it this way. Formula is called that as it is a formula and we needed the right powder to water ratio and again he spouted the shite about powder stuck to spoon. I said if he couldn't be bothered to make them correctly, to not make them any more. He kept saying "I don't make them your way" arg! It isn't MY way.
He really huffed and seemed to think I do it this way as I think it is easier and am just trying to get him to do what I prefer, and that doing it "his way" hadn'r caused DD any harm. I said that if he had bothered to look into these things, then he would realise that there are reasons for correct water / powder ratio and that he was welcome to look into it and see why I was getting rather irate.
Why on earth, after asking me to show him how to do it, and allready saying he wouldn't do them incorrectly last time is he still being an arse about it?
We are now doing that stupid silence thing. I am angry at him for saying he would do it right and then not and also for not understanding that I say these things to make the bottles safe for DD and I have no idea why he is angry at me....maybe he thinks I am neurotic PFB mother?
Sorry for the essay. Needed to rant.