@Sue Hammond
Hi Sue, I think there may be a couple of things going on.
I think Molly is getting some bouncing (from numbers dropping too fast and/or too low for her comfort); and I also think she's
not getting good duration from the Caninsulin, so this is possibly exacerbating the bounce problem (the numbers are going higher than they otherwise might, and maybe for longer).
It may well be that a gentler, longer-lasting insulin would suit Molly better. However, we've talked about this before and I know there are some things that mean this isn't currently possible:
1. Your current vet doesn't want to change insulin.
2. You don't feel able to use syringes (because of your vision problem).
A different vet may well be willing to prescribe a different insulin.
And maybe it's worth just
practicing using the syringes that you have (the ones with .5 unit markings) by drawing up coloured water into them. I practiced on oranges when I first started injecting, and quite a few people do that. It
may be that using syringes isn't going to be as hard as you imagine. But if it is too difficult, then at least you'll know you gave it your best shot (no pun intended!

).
If none of the above is possible then your only option, with regard to insulin, will be to experiment with the Caninsulin dose to find out what works best for Molly at any given time. And it may well be that her numbers do even out over time.
It might also be worth experimenting with different foods.
Some cats are quite sensitive to foods for all kinds of reasons (carb sensitivity, or sensitivity to one or other of the ingredients), and their BG can spike as a result of that.
It's still relatively 'early days' so there's every chance that Molly's BG situation can and will improve.
And there have certainly been improvements in Molly's health since she's been on insulin, despite the fluctuating numbers. This is really good news.
Eliz