Time helps. It can take a while and dissolved CO2 does keep sediment in suspension. To assist and expedite degassing I'll warm it up to mid 70's as racking date approaches (this helps CO2 release - sorta like warm soda) then vacuum rack to the next carboy and adding potassium meta-bisulfite. Maybe vacuum rack 2-3 times each racking date to release as much CO2 as possible.
You can also use fining additives but if there's still significant CO2 there will be sediment left in suspension.
I have a chardonnay clearing right now that I aged on the lee's for four months and then degassed and racked off sediment and used finings - It's still taking about a month to clear and almost there. Time will do it and there's not much you can do to rush it. Once clear you should still leave it in the carboy for another three months till you get no dusting on the bottom after three months.
Cheers!
-Johann