@astaingegerdm
Thank you so much for taking the time to reply and for your helpful remarks and suggestions. I suspected as much about the liquid stool going around the collected stool. Once I have results from an upcoming colonoscopy and endoscopy I might seek out a specialist at a university hospital. I doubt the prep for the colonoscopy will clear me out (failed in past years and I use Cologuard now) but they want to try Sutabs with Miralx and Dulcolax as a prep.

Any notions about what might work or what steps are taken if Linzess fails are appreciated.

Thanks again. This is a great support group.