Article: Grab the bottom of it on the inside, and pull the gasket back. You want to be able to see the metal gasket retainer. You should use the hex head nut screwdriver to do this. Lift the edges of the seal to find the screws underneath that are holding in the plastic liner and door seal. Often, the screws hold in a plastic liner, which in turn clamps the door seal to the door. Once all of the screws are loose, the door seal should easily slide out from behind the plastic liner. Don't be too forceful when doing this step, since some plastic liners can be quite brittle and crumble if you are too rough. Position one of its corners on the top of the refrigerator door. Push the lip of the new gasket over the metal retainer, and slide it behind the metal retainer and around the entire perimeter of the refrigerator door. The best method is to start in the top corners, and work your way around the door. You don’t want to tighten the gasket retainer screws all the way. You want them to be snug. Use a bit of baby powder or talcum powder to prevent sticking. This will help to prevent the door seal from twisting as it meets the metal of the fridge.  You are looking for any warped areas of the gasket. Repeat this process several times. Once the gasket looks like it is properly fitted, tighten the screws more. Alternatively, you can heat the door seal up with a hair dryer to fix the gaps. This softens the door seal and allows you to stretch it.
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Remove the gasket from the refrigerator door. Loosen, but do not remove, the screws that hold the metal retainer around the entire door. Pull the gasket out of the door to remove it once you have loosened the retainer screws. Take the new gasket, and install it. Use the hex head driver to screw the metal retainer in. Apply powder. Rub some powder around the hinge side corners of the door seal and where the seal slides. If this still doesn't prevent twisting, then wedge a screwdriver under the seal as you close the door, and leave it shut for an hour. Close the refrigerator door, and open it several times to inspect the gasket. Rub petroleum jelly along the hinged side of the door if you see some gaps.