"TimW" wrote in message
news
On 06/08/18 00:25, lopt wrote:


wrote in message
...
On Sunday, 5 August 2018 22:52:01 UTC+1, lopt wrote:
"newshound" wrote in message
o.uk...
On 05/08/2018 10:19, lopt wrote:

Have you tried conc nitric acid ? That should get it off, but
isn't
that easy to get.

what does that do9 to carbon?

Dissolves it.

No, it doesn't. Even fuming nitric doesn't.

Yes it does with boiling conc nitric.

There are limits to what I'll use as a cleaning chemical. Boiling strong
fuming acids are a good 2 steps beyond that point.

But there isnt anything else except molten potassium nitrate
that will get that carbon off without damaging the enamel.

The one or two detachable parts come clean after several cycles in the
dishwasher, just as an old baking tray with similar burned on fat will do.

I dont find that with the glass bowels from these,
with either Finish or the Aldi dishwasher tablets.
https://www.myer.com.au/shop/mystore... ZAaKgodgaMGuw

Obv I can't soak the cooker hot for several hours, but I don't understand
why there is no norma cleaning product.

Basically there isnt anything that works with the worst baked on carbon.

Normal ovens get rid of that by pyrolytic burning the carbon
at much higher than normal oven temperatures. That might
work with an oxy acetylene torch with an Aga, but might not
do the enamel much good; There must be a reason why it
is possible to get the top re-enamelled, but that isnt cheap.