Mary,
There are many members on this forum including myself have found that reducing their carbs at each meal-time beneficial in achieving stable blood glucose control, how far you reduce them is based on your own personal needs and your meter readings thereafter.
I typically eat no more than 30g of carbs for breakfast and lunch, and max 50g for my evening meal, which thus far keeps my bg within my own personal target range. As well as a reduction in carbs, I also use the low-gi approach too, which I find works extremely well together avoiding any post-meal spikes in my bg.
Interestingly, even though I have only been following a reduced carb/low-gi diet for less than a year, I have found that I have become more insulin sensitive, using much less insulin now than in all my 29 years of diabetes. Three weeks ago I went out for a family get-together at our local Indian restaurant, I estimated that I ate 120g of carbs and give the appropriate insulin ratio, and 90 mins later was 8.1, two hours forty five mins was 6.7, and five hours later was 5.9, the following morning I was 5.7, which I am more than happy with considering one time I would undoubtedly been in double figures for at least ten hours after such a carby meal.
So do try reducing your carbs and see if this improves your control, experiment and test is the best way forward and don't forget to detail and record all your results for future reference. Good luck!
Nigel