Hi, the crystals are a mix of rust and calcium.
The best thing to do is to pick up some CLR, It is a product that clears calcium lime and rust it works very well;-)
It is available in most home improvement stores and hardware stores as well. Basically you soak the fitting ends in this for 2 minutes to clear all that away and restore normal clear operation.
As for the machine fittings simply pour some into the hose and when you connect it, it will clear the filters screes on the machine as well;-)
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