Get some CLR (calcium, LIME,RUST) pour it into a cup and put your nozzles in there over night that would work... You should use windshiled wiper fuild instead of Tap water. Your house (tapwater) must have alot of minerals hhahaha you need to hook up a Water softener for your house.

*CLR (sliver bottle found @ your hardware store)

Or I can sell you mine! only used them for 3 months replaced them with LED nozzles hahaha