I bought my wife a 5800 for Christmas. It took a zillion tries to get past the CHECK TANK light. Finally worked but layed no fluid down. So i returned it and go another one. Much to my shagrin, the NEW one did the exact same thing. I did all the recommeded crap, but my insticts still leaned toward priming the pump. I took a 20cc syringe and drilled out the end so it would fit over the inlet and seal tightly. I filled the machine with water until it puke out. SUCCESS!!!
Perhaps IROBOT could include a modified syringe with the Scooba. Might save a lot of troubles....
Many thanks for this page. I bought a Scooba, spent a fortune on importing it into the UK, eagerly awaited the 16 hour first charge and then got faced with all this CHECK TANK rubbish.
FRUSTRATION, really kicking myself for wasting so much money on an item that didn't work.
Instruction manual - no use - no mention of priming pump at all!
Found this and similar pages. No Turkey Basters in my house, no old Fish Tank accessories. Eventually took a ball point pen to bits, attacked it with a hacksaw to get the end off it, filled with water and blew, and blew, and blew - boy do you need a lot of puff to get this thing going - eventually success.
There's obviously a design fault here, many would give up much sooner - I think many have, some to get a replacement that's exactly the same, and some completely lost customers. iRobot really need to include instructions to get past this and provide a kit of parts to achieve it - otherwise they'll just lose customers.
It's not like the Roombas that just work, the Scooba is a real fiddle to get going but once it's going it's brilliant.