I have tried silicon spray on the gate chains, it's not a good lube for moving parts. It drys like paint. I now use motorcycle chain lube, it's also used for military tank tracks. We have mostly had facilities in the desert with extreme heat 100+. I stopped using silicon on the roofs also, it don't last as long as some of the other products. They sell WD 40 by the gallon, I then put it into a plastic spray bottle. I don't just lube the door tracks I wash them out real good with WD-40 top to bottom. There is a small puddle of WD on the ground, which the bugs hate. Do you know what brand Silicon spray your using. I might start using it on the springs so it don't drip. Of course our door maintenance plan is for a facility running at 95% occupancy. I would never use WD-40 on idle doors because of the dust. I never lube locks, I have seen managers do it and it ruins them. I have never worked a facility in the snow and ice, so I don't know which cleaning and maintenance products freeze. I have had the small bottle of lube for Swamps freeze up and turn to ice. I never put WD-40 on the swamps, I use the lube designed for them, which looks like WD-40 but has a cool little container with an easy applicator. I don't like to store any cleaning products that come in aerosol cans. They explode in extreme tempertures. I have seen the bottom of doors in Colorado rusted out because managers use salt on the ice in the winter. I worked as a maintenance man for an apt complex for ten years before we started storage. Most facilities don't get the dust storms associated with the moonsoons in the desert. Also what kind of problems do you have with salty air in California if any. I know air pollution leaves a filthy film on everything like computer screens. We had a facility on a really busy street allot of trucks 18 wheelers. every day their would be a black fim caked on all our office equipment.