Treat the specified components as follows:
Lock cylinders-apply graphite lubricant sparingly through the key slot. Insert the key and operate the lock several times to be sure that the lubricant is worked into the lock cylinder.
Hinges-spray a silicone lubricant or white lithium grease on the hinge pivot points to eliminate any binding conditions. Open and close the door several times to be sure that the lubricant is evenly and thoroughly distributed.
Latches-spray a silicone lubricant or white lithium grease on the latch mechanism and friction surfaces to eliminate squeaks and binding. Operate the latch to distribute the lubricant.
Door seals-spray a silicone lubricant or a rubber protectant on the door seals and wipe the excess with a rag. This will eliminate squeaks and prevent the rubber from sticking to the metal.