sailnaway,
Interesting use of hand lotion. I installed a relativly inexpensive device sold by Wast Marine called an "In
Line Treatment System". You can search West''s on-line store with those exact words if your not already familiar with the device.
The odors as you may know are usually dying "creatures" in the raw sea water after it has set for hours. The tablets used in the treatment system are pretty efective at neutralizing the odors and also provide a lubricating effect on the plumbing parts.
I have read a post a while ago from someone who had no luck at all with it but it has worked for me for 3 seasons now. As well as your Avon seems to work - I can''t calim this is any better, but it does "automate" the task!
wlw