On Jan 11, 12:33*pm, "Fredxx" wrote:
I have a perfectly good chip fryer that is coated with caked-on old
sunflower oil.

It's sufficiently hard and thick that the detergents I've used haven't
touched it.

In the end I have put it all in the dishwasher and put it through a few
washes. *Some of the crud has become emulsified and almost peels off like
latex. *But there's a lot more to go and don't relish the thought of another
dozen or more washes in the dishwasher!!

Are there any detergents which successfully dissolve this type of stuff?

Personally I've found normal biological washing powder/liquid to be
sufficient to shift most fatty / oily gunk

Soak the item in hot water + washing powder for 10-15 minutes first,
then scrape the gunk off, dipping the item back in the water as you
go.

Once clean probably give it one more run in the dishwasher or hand
wash with normal washing up liquid to get rid of any residue from the
washing powder/liquid.

I'd recommend wearing rubber gloves as it allows you to have the water
a little hotter and protects your hands.

YMMV

Simon