I don't know how long it is since i last cleaned it, but I usually only clean it when my computer makes funny noise... (it tends to know how to "scream" when it needs a clean..)

I can see that you can buy some canned ones for about $20.. I assume they would work better than the mouth option keke.. but also heard that gotta becareful not to let it drip...

Whatever you do, don't spray the can upside down. Instant freeze spray.

ohh thx for the tip~ XD