Around here silicon lubricants can be picked up anywhere. Hardware stores sell spray. Plumbing section sells grease for plumbing fixtures.
Physics 101: Things like to equalize and break down to the common denominator. If you put ice in water, you will get water. If you put a liquid petroleum and hard petroleum product together, the hard product will break down. Plastic is a petroleum product. This is also very evident in synthetic rubber. Grease used in fittings with synthetic rubber boots will break down the boots until they fail. Or with plumbing, silicone grease is used in faucets because petroleum based grease will break down the rubber o-rings and the faucet will fail.
Silicone based lubricants work because they are inert.
By the way, check your center cable cover in the middle-bottom of the display. That small "C" shaped cover can easily get bound up. Apple made several changes in the display and cover because of issues there.
Physics 101: Things like to equalize and break down to the common denominator. If you put ice in water, you will get water. If you put a liquid petroleum and hard petroleum product together, the hard product will break down. Plastic is a petroleum product. This is also very evident in synthetic rubber. Grease used in fittings with synthetic rubber boots will break down the boots until they fail. Or with plumbing, silicone grease is used in faucets because petroleum based grease will break down the rubber o-rings and the faucet will fail.
Silicone based lubricants work because they are inert.
By the way, check your center cable cover in the middle-bottom of the display. That small "C" shaped cover can easily get bound up. Apple made several changes in the display and cover because of issues there.