If you can see the screen mesh the filter is still flowing adequately. For optimal engine performance the filter should be cleaned at 10 restriction. Do not exceed 16 of restriction . If your driving mileage is low and the filter is not ready for cleaning, examine the filter once a year for adequate oil. If necessary, lightly add aFe filter oil to the clean side of the filter.
Sunlight deteriorates the oil.
If the filter is exposed to sunlight it will be necessary to re-oil the filter periodically. This is one of the finest heavy duty filters available on the market today, and as always, we feel that thinking ahead, getting the right product or tool for the job, is well worth it in the long run.