I'm replacing the tubular tire on an all carbon wheel (no aluminum brake surface) and cleaning the old glue off takes a long time. What are some tips, products or tools I can use to speed up this process?
I wouldn't use any solvents because you have carbon rims.
Hot air is the best solution. Use the heat from a blow drier to gently soften the adhesive to where it will ball up with rubbing from your fingers.
If you only have a heat gun, you can use it but be careful as you can literally strip the paint off your rims with it (or cause your rims to deform/delaminate) - so I'd only use the heat gun very lowest setting.
A stiff pencil eraser can also help bring up the adhesive.