Fridge Air Filter

--The washing machine's got one; why not have one on the fridge too? Face it: the damned thing weighs a ton, it has a radiator and sometimes even a fan and every dust bunny on earth eventually winds up fouling the plumbing. So why not add a 'lint trap' to the fridge, so it keeps running at peak efficiency. This would probably greatly reduce one's electric bill, too, as it wouldn't have to work so long to cool as much. --This idea was prompted by our fridge packing up with something like a wastebasket full of dog hair, the frozen stuff thawing out and the repair guy saying he couldn't make it by until 'next Wednesday', whereupon in desperation we bought a replacement. Both now working fine, thanks.