If you can push the glass back into the setting tape without removing the inner door panel, you can spray it with WD40 with the cans that have the long tube that flips up. Try this first, since it will save you a lot of work. If you are going to take it apart, make sure to spray each nut on the regulator with some white paint, so it will mark the exact location, for when you have to put it back together. This will save you a lot of trial and error of getting the adjustment correct. Also, if you don't take it apart, the glass will go back exactly in the same place it was originally installed at the factory before they adjusted the regulator and tracks. If you take it out, it is doubtful that you will get it back exactly in the same place in the lower channel, so you will need to adjust the regulator for the new position of the glass in the channel. Sometimes it is best left for the glass guys that know how to do this job, and get in and out quickly. Just find a glass company that has some older guys that have worked on crank windows in the past.
Also, be very careful not to break the glass, since it is curved, and it is hard to find, and expensive when you do find it.