I bet you are using Humalog, right?!?
It is more common for Humalog to go bad after a few days in a pump than NovoLog.
Here are a bunch of reference links. If you can get a prescription for NovoLog instead of Humalog, I think it will work better for you. If you can’t do that, you might need to get a script for 2-day pod wear instead of 3-day.
If you can, try NovoLog.
Here are a bunch of links that support this.
(By the way, in these references, the name Aspart refers to Novolog, and Lispro is Humalog. That is their generic name.)
“Resistance towards isoelectric precipitation is highest for IAsp [insulin aspart], lowest for ILis [insulin lispro]"
“Aspart is the most compatible of the 3 RAIAs [rapid-acting insulin analogues] for pump use.”
“The overall adverse-effect score was significantly lower (P<0.005) with insulin aspart than with insulin lispro”
“Postprandial blood glucose was more stable with insulin aspart than insulin lispro”
“Daily insulin dose (units per kilogram) was significantly lower at week 16 for subjects treated with aspart compared with those treated with lispro”