ok, so last night i gave dd her usual 150ml feed and deducted 2 scoops. she stayed asleep 4 more hours (woke at 1). DP's alarm is ****ting me to tears going off 5am. DD is so alert.

Thinking continue deducting 2 scoops for another week then deduct 3 following week etc...

now DD has dropped to 1 nap a day she's dropped a bottle!
Uh honey - do you mean that you are diluting the formula? Cos it says on the tin that you aren't supposed to differ from the formula and water ratio - it can make bubs sick. I'd say make up less formula and then if still thirsty, give a sippy cup of water instead - but I would never give less scoops to water, simply because what it says on the tin