OH it is sticky! Yuck - yeah take it apart and clean it. The first time you do that is the hardest. The manual should have instructions how to do that. Take lots of pictures. Use a muffin pan or something to keep things in order that you took them out. It helps to know which way things are turned. Go slow. Keep DH out - (lock him in the basement) Read the instructions several times. It is like making a quilt - you have to read the instructions and work up your nerve. Clean as you go. Here is a generic type manual. You will need to look at your type of tension and then go from there - it has info your owner's manual doesn't have.
http://www.tfsr.org/pub/technical_in...echanism_2.pdf the info for the later 66 and 99 should work. You can print it out and make notes or what ever you need to do.