So I'm getting round to servicing our double garage door. Until today, I hadn't realized that under the previous owner whoever installed or serviced it decided to put black grease everywhere. This has turned really sticky. So I need BITOG advice on the following: 1) I need to get this black grease off the tracks. WD40 seemed to be doing a good job but my can has given up spraying. What should I buy to replace it? More WD40 or something else? I'd like something as friendly to the environment and humans as possible but it has to be effective! 2) There is black grease all over the nylon unsealed rollers, so I'll swap them out for sealed ones. Once they are installed, what do you recommend for lubrication of the stems? White Lithium Grease or Silicone spray. Some say white lithium grease is the best, others say silicone spray will not attract dust. Also does anyone have a recommendation for 2 inch roller with 5 inch stems? 3) I have 31 hinges in total and they've also had this black grease applied to them and their movement has also become sticky. What's the best way to deal with this? Take off several at a time and soak them in a bucket of something? 4) I've already put white lithium grease on the torsion spring. Haven't touched anything else yet. What else should I pay attention to for cleaning and lubricating and what should I use?