Do you basal test?
Are you altering you hourly basal rates correctly? Ie uf you are say
1pm. 9.9 (no correction)
2pm 5.6
3pm 5.2
4pm 5.2
5pm 3.0
What changes for your basal would you make? Assuming that you had not ate lunch....I wonder if you are checking and adjysting your basals correctly.
Also are you trying to leave 5 clear hours between meals? (Unless hypo)....