Review on Revitalize Your Cabin Air Filter with K&N's Cleaning Kit: Sprayer Bottle Cleaner & Refresher Kit; Enhance Filter Performance; Service Kit-99-6000, 99-6000AMZ by July Sin

love the pulp bottle. The aerosol can is simply sprayed everywhere and it is more difficult to control the amount and target. It also seems harder to tell when you've applied too much or too little. Using a syringe, simply apply an even amount of oil along the ribs on either side of the filter, allowing time for the oil to soak into the filter fibers. Filter. That way you can start with less and if "soaking in the middle" isn't enough, you know you need more and can judge how much more remains by the amount you applied the first time . After a while you will get a good feel for the amount of oil needed to change the oil in the filter. K&N filters are also specifically sold with a specification stating the amount of oil required and this information can also be found on the K&N website. site. For example, my car's filter requires 1.24 ounces of oil to re-lubricate the filter. With a squeeze bottle it's very easy to see how much oil has been applied - it's just the liquid in the bottle and there is a sensor that lets you see how much oil is in the bottle when you start how much is left as you work and how close you are to the K&N recommended amount of oil for a proper oil change. With an aerosol can, it's difficult, if not impossible, to know how much oil you've sprayed. Hope that helps!