same story here, 2 brand new scooba 450, second as replacement from irobot corporation directly,
and still 200/300ml clean water in tank after long cycle, no matter how small or big the room is,
and always fewer dirty water on tank after long cycle compared as old original software firmare in scooba 450, i suppose 1.2.3, they both nowa t 1.2.6.
My first scooba 450 was at 1.2.3, first long cycle used all clean water and filled by half the dirty tank,
then stopped at all using clean water at the second run and onward,
the fw upgd from gordon/vic7767 helped, but only half way.
You can read the story here, use google translator for the details if you really like to know them:http://www.irobot.it/forum/topic/4438-s ... isfazione/
Asked directly iRobot Corp an explanation after second scooba replacement
and below this message is their reply, buit i'm still
waiting their answer for 2 very simple questions,
for which we all can be quite confident that their answer will be
somenthing like in politichese and legalese language,
that is, no real answer at all, we can 100% sure about this:
. the technical details of the issues that the new software version 1.2.6 tackel ?
. the new behaviours of the Scooba 450 that differ from previous original software firmware version ?
here below irobot corp answer about clean water usage and the possibility to go back at old fw 1.2.3
The reason why
we do not provide the exact information of the amount of water required for the large room cleaning cycle
is that the usage of water depends on the size of the floor of the specific home.
The Scooba will put down as much water as it would require for the actual cleaning
without taking into account exactly how large the room is
or if there is any water left in the tank.
For the large room cycle the Scooba will use a maximum of 700ml of water which is the entire tank.
For the small room cycle the Scooba is programmed to use a maximum of 350ml of water
which is half the tank
so that the other half of the tank is left for another run.
Unfortunately we do not have information whether a downgrade of the Scooba software is possible
and we would not recommend it as the newer version tackles issues that the Scooba may otherwise experience .
finally the revealing words of uno_bliss here http://www.thewrkingparent.com/home-dec ... 12-48.html
>>I sell Scooba 450, but I personally don't recommend it, unless customer insists, then not my problem liao.