what is your facility protocol?

I have a resident who refuses to get out of bed, refuses to eat anything other than magic cups and drink strawberry glucerna. He is on a mechanical diet with nectar thick liquids. Once in a while he will eat and drink things his family brings him in that are totally off limits to him d/t being diabetic and based on his MBS and ST. Here is the problem he is unable to have a BM this is a continuing problem. He gets 30 mls sorbitol nightly and just about every day his wife comes in and wants him to get a suppository or to get an enema. We have been round and round with her about this. So the other day I give him the enema and we sit him up on the BSC and he is just sitting there and nothing. After he has sat there 20 minutes and is now demanding to get back in bed I attempt to manually remove, all I can reach is two very small hard balls of fecal matter. There is more I just can't reach. So now he is back in bed and I am having a conversation with his wife, these never go well. She proceeds to tell me that the reason he can't have a BM is because of all the thickener that he consumes is causing his stool and his saliva to thicken up. I pretty much had to get out of that room right then cause if I didn't I just may have had to .
So anyway what would any of you suggest that we do to help him along?