Sunroof sunshade squeak fix

This is a no brainer that I should have fixed a long time ago and never got around to until today. Bought an 07 OBW LTD new, and shortly thereafter noticed that I was constantly having to open or close the dual sunroof shade by a small amount, to get rid of a small squeak when the car vibrated over uneven pavement. The solution was so simple I slapped myself twice for not figuring it out sooner.

From inside the car I opened the sun shade completely by hand. Then I sprayed a very small amount of WD40 (silicone spray) using the tiny tube extension that comes with the spray bomb into the Aluminum channel that the sun shade slides in on both sides of the car. Don't use very much as it may well find its way onto the headliner and develope into a stain. Open and close the sun shade several times to distribute the lubricant, and Yipee, the squeak is gone! Hope this helps someone else.