Problems with Moccamaster

I have a year old KB 741 and for the past month it hasn't been
extracting well, The coffee is very weak. I think the problem is
uneven water distribution from the sprayhead. It seems to come out
primarily from the last two or three holes, except for a few times
during the cycle when a blast will bubble up and come out all 9.

I've descaled, tried different water/coffee/grinds, but to no avail.
The water temp is 209-212 from the sprayhead.

Any thoughts? I'd be very interested to know what your Moccamaster
water distribution looks like through the cycle. Please take a look
and let me know if the water consistently comes out from most of the
holes.

Thanks!

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