Dishmaster drip--It happened again

I had posted here a few days ago about my Dishmaster Imperial Four leaking. I found that I was getting a big leak, really a flow rather than a mere drip. By loosening the screw holding the handle onto the stem's spline and rotating it back two notches (so I could tighten more) on the stem's spline, I was able to get the the leak to stop with the extra force on the seat. After a few days, the leak went away even if I did not tighten the faucet all the way. I then rotated the handle back to the original orientation on the stem. There was no leak for a few days.
Then suddenly, the big leak came back. As described above, I tightened more again. The leak stopped again. What can be happening that makes the leak come and go?
I did not take the faucet apart since the last time I replaced parts. IIRC, and I may be wrong, There are no washers in the normal sense. There is a rotating flat seal with a hole in it. There is some kind of an elastomer bushing that presses upon the seal and slides.
Bill
-- Ferme le Bush
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
http://www.caslerhardware.com/shop/dishmasterpartsrepairandreplacement /
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.