Floscan fuel flow meters - how to fix ?

[superheat6k]

My boat has Floscan 6000 series flow meters. Likely due too lack of boat use one of these is not reading any flow, the other is not very constant.

Is any one on here familiar with these systems ?

I suspect the turbine flow sensors may have become a bit stuck with some sludge. My plan is to remove the supply & return sensors and flush these out with either white spirit or kerosene.

Any tips on how to do this would be appreciated, as I understand these are high precision sensors, so I won't be poking anything in to try to free them off.

I wonder if an ultrasound cleaner might be useful.

Thanks