Cleaning my HKS Air filter

[Weirsy]

So this is the first time i decided to clean this thing as it was lookin kinda dirty.

So i went and bought K + N air filter leaning kit. My thoughts were that it should basically do the same as any other cleaner. Correct?...well i used the cleaning solvent and all the grease, or w.e it is, black shit ran off and the filter was lookin almost brand new.... Then part II... Oiling it. Was i even supposed to do this? cuz i oiled it and it turned the inside of the green filter purple. Now i dont see why this matters, but i saw no trace of purple when i cleaned it before so im just wondering.

Do i continue along with the K+N cleaning instructions and do the 2nd coat of oil and then dry and install.

or

Do i clean the filter back to how it was after step one and either install or do somehting different from here?

Thanks guys