It's a fact, keep your clipper blades clean and they'll cut for a long time. Naturally instant gratification is better than a thorough job. Proper blade care depends on how much time you want to dedicate to it.
Let us spray: Everybody does it. Grab the old can of "Kool-Lube" or "Cool spray" or whatever and hose down the clipper blade. After all, it says right on the can that it will only take a quick shot to clean and lube blades. Uh-huh. A few minutes later the scenario is repeated.
Sprays are expensive because a lot is wasted. The spray is cone shaped, and while you are gonna hit what you're shooting at, you'll get everything else behind it too, such as the floor, counter, grooming table, dog being groomed, and bystanders.
Sprays don't clean and they don't lube. They contain a lot of alcohol and water. Anything else in the mix that’s supposed to clean and lube is in minute amounts, therefore any lubing and cleaning claims are a stretch. Sprays do dissolve clipper oil, thus removing needed lubrication.
Sprays are toxic (check the can) When you spray the stuff, it remains airborne and you get to breathe it.
Pressurized sprays are flammable/explosive. (check the can) At the very least, sprays are flammable and in the right conditions, can detonate. All it takes for the vapor to ignite is a wayward spark from a heated hair dryer, your clipper, or anything else.
Pump sprays are not much better. The only improvement you'll get with a pump over a pressurized spray is the concentration of blade lube/coolant/cleaner.
Blade dips clean better. Blade dips control the cleaner/lube and can be used in full strength making them a lot more effective. Some blade dips claim to have blade-lubing capability but there's nothing like a drop of real clipper oil.
Cooling is the real issue: If your real reason for spraying is to cool a hot blade, the evaporation of the alcohol removes some heat and gives you that fuzzy feeling of actually cooling your blade.
There is a better way and it's called a heat sink. Consider a ceramic tile purchased from any home improvement center. Ceramic is naturally cold and will draw heat from a hot blade. You have to rotate blades from your clipper to the tile, so have several blades and maybe a couple tiles. The normal tile size is 6" x 6", but 12" x 12" tiles sell for a little more and can cool several blades at one time.
You can make the tile colder by putting it in the freezer but remember that a very cold tile will attract moisture. Since moisture results in rust, you can put the tile inside a plastic bag. The cold will go through the plastic bag, but the moisture will stay inside.
I plan on living forever. So far, so good.
See Also: Dippity Doo Dah!