Originally Posted by rkohut

I just dunk it in a 5 gallon bucket of hot sudsy water and let it sun dry. Then spray a coating of light oil.

As of April I will have had the K&N filter for 5 years and have put on about 30kmi on the 328kmi 617 turbo.
It still starts at 15 degrees with as little as 1 second of glow and has gobs of top end power, relatively speaking.