When using it, always have something absorbant below the blade, try not to spray into the air to stop you from breathing it in. If you are using this product to treat a lot of blades at one time, be sure to wear a mask to stop you from breathing it in.
Spray on both sides of the blade. The concentrated nozel is great for cleaning the blade and getting debrit out from the grooves.
If you don't have a lot of backup blades in your box, this product is an essential. Waiting for a blade to naturally cool down can take a very long time. If you're spraying a blade to specifically cool it down, be sure to spray it along the back, and make sure the blade is cool before placing it back onto the clipper.