electric windows

i have a 1993 rodeo. the problem is that the windows move real slow and take a long time to go up. could it be a worn motor or do they need greasing? it happens to all the windows. any help would be great. thx.

we have a 2000 4x4 I had a problem with the windows sticking. I took the door panel off and found that some black tar like glue used at the factory to hold the plastic lining to the door had 'melted' and glued the window shut. Since then, I have found spots of that glue in the door jams twice. It looks like nasty black tar. Another time, I thought the windows were broke, but had accidentally tripped the window lock switch. user error.

i havent had time to take it apart and look, thanks for the info, ill look this weekend and let ya know. thx again