I dont correct after 30mins, I started doing the 2hour after eating and when high I would correct, 1hour 30mions after the correction my levels are usually acceptable and remain at that level for quite some period of time until recently when they are dropping but they can drop anywhere between 1hour after food to 6 hours after food (before my next meal) - unfortuantely I cant tell when they are going to drop or whats causing it, which is why Im so frustrated at the moment.
Regarding bolusing 15mins before eating that is almost impossible unless I want my meal cold as I never know carbs until its all cooked and I can weight it all and then othertimes I may not feel as hungry as I was previously by the time food is in front of me
Sorry misread the 1 hour 30 mins.
Well unless you time the insulin to coinside with the food and use the correct type of bolus you are on a hiding to nothing in that dept.
If you are cooking the food surely you must know what you are eating and how much carb wise it contains? Simple solution is think ahead as to what you are going to eat and or have a set amount of carbs for each meal. If you are feeding a family then cook yours in a seperate dish so you know exactly whats in it.
So what it all boils down to I suspect is not timing insulin to food absorption, wrong type of bolus for foods and wrong durration of insulin.
Stick to simple carbs until sorted ie skip the likes of pasta,rice, pizza. Then change your durration as already suggested and do not do any corrections at all for the meal eaten and test 2 hours after 1st bite then 3 and 4 hours. If you are sky high after 2 hours then look at your ratio. Just sit out the high though until your next meal.