You don't need distilled water, just clean water and preferably not well water. Even the huge industrial washers that we made for Intel to clean their CPU's used standard filleted water. Just about every circuit board for all electronics are ran through a washer using water as the solvent after the final solder flow.
http://www.stoelting.com/circuitboard.html
Sometimes it's not about the replacement cost of the item, but the satisfaction of repairing it. Our landfills are full with TV's, VCR's and computers that are easily repaired but tossed because Wal-Mart sells junk for cheaper than the repair cost, albeit they barely last their warranty.