Is a window that is slow to shut from about 3/4 of the way up a sign that the regulators are on their way out? I thought my regulators had already been replaced as when the windows are fully open the glass still pokes out a bit.It's probably the common fault - get a repair kit from the stealers (they are cheapest) and then use this guide to replace:
If it's sticking, don't use it - put it up and leave it until you confirm the problem. It can fall into the door, then you're left with an insecure car and it'll get rather wet inside until you fix it!!!
Oh, you mean the felt type stuff that the glass slides up and down around the edge of the door?The runners are the black felt type guides the glass slides in, talc does work and doesn't leave an oily mess like lubricant sprays. Try applying it with a cotton bud or something similar.