On Tue, 14 Oct 2008 10:38:34 -0500, Omelet > wrote:

>In article >,
> Corey Richardson > wrote:
>
>> On Tue, 07 Oct 2008 08:33:12 +0100, Jane Gillett
>> > wrote:
>>
>> >I suggest what
>> >happened with the onions may have been polymerisation - you formed a type
>> >of plastic which was resistant to water and detergents and that's why you
>> >couldn't remove it.
>>
>> You have the problem to a tee! And, probably, the only thing that will
>> shift that now is methylene chloride.
>
>Easy off Oven Cleaner out in the sun should work too.

That's not a bad idea either...