Originally Posted by Xpatriotsteve
I always wondered, what happens if you do clean an uncleanable hose? And why?
I don't know if this is the case with the KM Rainbow, but some of your non-washable hoses have metal coils inside them that will rust very quickly if you wash them. Found that out the hard way with my cheap little Chinese pumpkin. Rust in the lungs = not good. Some of your nicer hoses are covered in material that cannot be dampened without it deteriorating as well as having wooden tips.
If you are looking to buy a hose, but being washable is a big selling point for you (which is understandable), then look into the washable hoses such as the Razan, Nammor, or Grand.