Step 2.
Don't increase the dose until your cat has been on it for at least a week. If you have reason to be concerned about hypoglycemia, or if your cat won't eat, do decrease the dose and contact your vet. Do test your cat's urine frequently during the regulation process using Ketostix or Ketodiastix, and contact your vet immediately if the cat tests positive for ketones. Do be consistent in the timing and type of food. Do give the shots at about the same time every day.
from
http://felinediabetes.com/start-low-go-slow.htm
Since you are having glimmers of lower numbers when you were successful at the injection, you may very well be in a good place with the current dosage. Give it a chance to play out and maybe practice on the injection part.
You don't want to get in a hurry with the insulin.
As someone said to me.... this is a marathon, not a sprint....
You can get a good feel for the correct pressure by practicing injections on a orange, lemon lime, Or even piece of meat.
Have you seen this?
http://www.felinediabetes.com/injections.htm
I try to pull the skin away more than they do in the picture so I'm sure not to hit anything else.
If you keep the numbers on the syringe on the top where you can see them while injecting, the bevel of the needle
is in the right place. It hurts when you have the syringe upside down. ( the needle drags and pulls)
And it really helps to hold it and direct it in horizontally.
You will get the hang of it. The more relaxed you can be, the better you will do.
I know that's easy to say.
My poor little kitty still growls at me every time I inject her. She doesn't run but I get that little growl like "you know I don't like this".
If you have a long haired cat, it might help to trim a few spots so you can see the skin... or you just have to keep parting
the hair until you see the skin. You'll miss less if you see the needle go in.
If you think you missed, smell where you tried to inject.
I'm the one who says the insulin smells like really cheap plastic bandaids.
Good luck.