Need to "learn" to relax to allow switches.

I have this problem, too.

Something that my T tried last week that I found surprisingly helpful, was she had me hold two small vibrators in my palms. More than any other day, one of the alters kept "poking" through. The T also made me change chairs and face a different direction. I think it was a combination of so many different changes. If you can bring yourself to try some changes like sitting in a different chair, maybe that would help.