Changing and cleaning the filter on an air compressor (linear air pump) is a standard, straightforward maintenance task that should be done 3 to 4 times per year to keep your air pump working well and get a good long lifespan from your product.
This short (5 min) video shows that this can be easily done without the need for a specialist to be called in, keeping your annual costs to a minimum
Air filters can be quickly cleaned in warm, soapy water, after a few cleans they will need replacing and are relatively inexpensive.