Every year about this time I take all the sheet metal off the outside condensing unit and give the condenser coils a thorough cleaning. Every year when i do it the outside of the coils are covered with crap in just 1 years time. I'm thinking about wrapping the outside of the unit with some filter material from a roll. Something like this. https://www.airfilterhub.com/collec...environet-hvac-furnace?variant=39252902183006 I would change it several times during the year as needed. Would there be any down side to doing this? It is a 2008 4 Ton Ruud R22 unit. The unit looks similar to this with the vents on 3 sides.