I had the same problem for the longest time until today. I took a super soaker squirt gun (hand style with single pump on top) and shot it up the hole wear the water intake is for the pump (on the bottom of the white plastic part that has the trigger and water pump inside) while holding the trigger down to have the pump running, too. Did it a couple times for good measure. ;) When I tried it with the tank attached, it worked again. After that, I ran some rubbing alcohol through it to clean it up a bit but you could probably use hydrogen peroxide or distilled white vinegar as well. I'm guessing that the salt and baking soda mix eventually builds up and plugs it. Definitely plan on keeping the squirt gun handy in case it happens again. Hope this helps.

Can you tell me what name and style of supersoaker you used. Thanks.