What did you do last year? - Did it work for you?
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"Artificial intelligence is no match for natural stupidity" sailroom <span style="color:red">The place to auction your previously loved boatie bits</span>
If you have a water heater in the circuit, it is well worth blowing the water out of it for the winter with compressed air. (the LVM dinghy inflator is a good tool for this task!)
Milton will need to be thoroughly washed thro the system, it tends to taste pretty bad in tea/ whisky etc. or perhaps keep a small 1 gall container for drinking only.