On Sat, 05 Jun 2010 09:21:29 +1000, Tony Bryer wrote:

Every few weeks this would clog up with something the consistency of
grease. In the end I took it out and replaced it with a Magnaclean which
doesn't obstruct the flow as it collects stuff.

But still requires cleaning every few weeks of the "grease" or isn't
it trapping that? The "grease" is probably bacteria. Not overly
convinced that any iron corrsion products are magnetic either.

--
Cheers
Dave.