2002 sequoia electric moon roof sticking

I just cracked the moon roof for spring, the moon roof only opens to the first setting which is about 5" from all the way open, and sticks when I try to close it, have to give it a slight pull to get it started. I found a piece of weatherstripping also on the cover when I opened it up, no leaks though, just went thru the car wash with it. any advice on why it sticks and wont open would be great, thank you in advance