Pry up the lip of the gasket and tuck the plastic tube under. Spray lube in here also:
These handles with suction cups are meant for use in the shower, to avoid slip and fall accidents. They work good on glass, and cost less than the pro auto body tool:
Apply inside the cockpit:
View from the engine bay:
Finally, use some cargo straps to apply even pull force:
At the end, this is a two person job. Remember to wear gloves and eye protection in case something goes wrong.