<<Disclaimer: Verify this information before applying it to your situation.>>

Sorry for the long delay. I've had some important matters to take care of
but all is well now.

I didn't have time to call the companies myself, so I'm not going to
guarantee any of the following. Here is a list of gluten-free dishwashing
detergents as compiled from replies:

all palmolive products
dawn
ivory
joy
cascade


Thanks to all who responded and good luck to all of us.
Jessica
NYC