Problem: mineral dleposits. Just fixed mine.... DO THIS OUTDOORS. Add 1/2 c CLR to the tank, let sit for an hour, turn on, allow to heat and pump. May have to refill with CLR and repeat. Be persistent, and eventually you'll blow out a wad of dissovled minerals followed, happily, by billows of steam. Again, do this outdoors and keep the mop pointed away from people, plants and things. (I aimed mine into a cardboard box.) Follow up with a couple of tanks of water and pump until empty to clean out any residual CLR and loosened deposits. (I continued to get some black precipitate through the first water cleaning.) I will add that I began this process first with white vinegar, then with Lime Away..no luck put perhaps I was not sufficiently persistent. Or perhaps it was the sequence of attempts. (Also, do not take off the mop head...the part to which you attach the pads...it's tough to get off, does not allow access to parts that need cleaning (thought it would, not not so), and practically impossible to get back on.)
Alternatively, call Shark...they'll offer to repair for $18 plus $10+/- shipping, or may offer you a new one at "preferred customer" rate of $39.95 plus shipping. Good luck, and please remember to try the CLR outside.
on Jan 26, 2021