hello mate, I have been using this for years. Kit contains one "cleaner" and one "lubricant" spray.

http://www.ebay.co.uk/itm/K-N-Rechar...item5d56bdf2f7

mind that the way to keep your filter like new (for ever) is the way you clean it and you have to do as below:

1. take your air filter and spray it allover with the "cleaner" spray.
Let it work for at least 10 mins. It will soak all the dirt.

2. Fill a bucket with tap water. Keep the filter submerged inside the bucket and move it gently back and forth, twist it left and right... this will remove the dirt from the filter. Replace the water with fresh and continue until no more dirt gets dissolved into the water.

3. Take the filter out of the bucket and keep it under gentle water flow under the tap. Water should flow from the inside of the filter towards the outside. This will remove any leftovers.

4. Now your filter is clean. Let it dry alone but not under hot sun or strong heating source. Let it take its time and dry gently. Do NOT force it to dry faster. NEVER EVER blow compressed air to the filter. This will destroy the thin layers that consist the filter. You can use some paper towel, touching the filter to gently absorb most of the water. Then let it dry completely.

5. When it is finally dry, spray with the OIL the OUTSIDE of the filter. Just a thin oil layer, you don't want it dripping oil.

6. Fit the filter back in place and your are ready to rock!

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