Your right about not getting oil on electronic machine components,because it would cause an accumulation of dust,carbon,and everything else that's attracted to electronic engines. You can feel the static next to a machine like this sometimes. That draws dust,and carbon.

I have ionic breezes for my allergies. I clean the grids,and put them back in. If I got oil on one of those grids,or filaments,it would destroy the machine probably. They have two filaments going down the ionic breezes that attract dust. I only use water to clean the grids,and dry them,and let the rest of the moisture evaporate before I put the grids back in.

I could not get into the fan spindle. I've done something right by tinkering around with it. I don't want to pat myself on the back yet,but it's doing better.

The computer is about 11 years old,and something broke when I was attempting to get inside it. I vacuumed that area,and tried to put it back together,but a small plastic holder clip broke off. Now I have duct tapeholding one side of the computer to the front. The back of it is loaded with rivets,and not screws. I'm the third person who has owned this computer,and have had it for several years. BF