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Cleaning Coated Cast Iron Grill Grates #5323320 01/15/20 10:17 AM
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First of all, I no longer have a gas grill … but the grates I have on my wood pit appear the same.
I have been cooking bbq with them a long time … and it became really hard to remove meat residue with just my normal overnight soak in Dawn. (I pre coat with Pam for grilling)
Closer inspection with a bright light showed crusty carbon had completely covered the smooth coating.
I found oven cleaner to constantly remove the black crud … but I’m $20 deep buying that and new grills are $80

Brushes don’t do anything and I don’t want power tools to damage the coating
I don’t have the ability to apply super heat … this stuff is baked on pretty hard.

The el cheapo cleaner was doing Ok, then I buy one made for gas grills (costly) … but like something on a boar hog.
At 75% clean would you stay the course or know a real good spray ?

Re: Cleaning Coated Cast Iron Grill Grates [Re: 4WD] #5323333 01/15/20 10:27 AM
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CT8 Offline
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Heat is your friend. Build a big fire and get the' hopefully" cast iron grate red hot . Let cool then go from there.


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Re: Cleaning Coated Cast Iron Grill Grates [Re: 4WD] #5323334 01/15/20 10:27 AM
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Fitter30 Offline
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Take a plastic trash bag put grills in bag pour in 1/2 gallon household ammonia to wet all surfaces let sit a day. All the burnt on stuff will fall off. Works on oven grates also. Just do this outside.

Re: Cleaning Coated Cast Iron Grill Grates [Re: Fitter30] #5323344 01/15/20 10:35 AM
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Will do … I have a gallon jug that’s been looking bored on the shop shelf …

Thanks !

Re: Cleaning Coated Cast Iron Grill Grates [Re: Fitter30] #5323347 01/15/20 10:40 AM
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CT8 Offline
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Originally Posted by Fitter30
Take a plastic trash bag put grills in bag pour in 1/2 gallon household ammonia to wet all surfaces let sit a day. All the burnt on stuff will fall off. Works on oven grates also. Just do this outside.

I have to give the ammonia a go thanks for the tip!


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Re: Cleaning Coated Cast Iron Grill Grates [Re: CT8] #5323349 01/15/20 10:41 AM
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Originally Posted by CT8
Heat is your friend. Build a big fire and get the cast iron grate red hot . Let cool then go from there.


I should probably do that for the whole pit. It’s done way too many hours at only 200F-225F and the whole inside has CBU
I have so much wood that I sat by the fire pit on a 55F night, LoL

Thanks …

Re: Cleaning Coated Cast Iron Grill Grates [Re: Fitter30] #5323356 01/15/20 10:53 AM
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Originally Posted by Fitter30
Take a plastic trash bag put grills in bag pour in 1/2 gallon household ammonia to wet all surfaces let sit a day. All the burnt on stuff will fall off. Works on oven grates also. Just do this outside.


Took the whole gallon to submerge them in the same sink under the cook shed … but it’s just a few feet from the water heater and main water line … so the rinse hose is hot and has great pressure on the wand

Re: Cleaning Coated Cast Iron Grill Grates [Re: 4WD] #5323374 01/15/20 11:20 AM
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Kestas Offline
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How would any coating survive red hot temperatures?

On another note, every time I have the power washer out, I include the barbecue with the cleaning.

Re: Cleaning Coated Cast Iron Grill Grates [Re: Kestas] #5323387 01/15/20 11:38 AM
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I can’t get grates red hot … but they are already in vinegar
If that works … I’ll probably just heat the pit to 450F (no grates) to sanitize and then take a stiff tire brush and some Greased Lightning to it a couple rounds so the carbon does not fall from the lid onto the meat.
Going forward I can do the vinegar ahead of the Dawn soak to get the grates more in PM mode.

BTW: anyone ever see the Tonight Show spoof where they went around inspecting BBQ pits.
I could not find the video.

Re: Cleaning Coated Cast Iron Grill Grates [Re: 4WD] #5323392 01/15/20 11:44 AM
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Danno Offline
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Submerged in vinegar and baking soda is my go to.
Also, when firing up the grill, when thd grates are hot, use bbq brush with a good amount of snow on it, run on the grills and they steam clean. Finish cleaning with a lightly canola oiled pad of paper towels.


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Re: Cleaning Coated Cast Iron Grill Grates [Re: CT8] #5323451 01/15/20 12:41 PM
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Originally Posted by CT8
Heat is your friend. Build a big fire and get the' hopefully" cast iron grate red hot . Let cool then go from there.

Yup! you need to burn it all off.

Re: Cleaning Coated Cast Iron Grill Grates [Re: 4WD] #5323538 01/15/20 02:09 PM
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dadto2 Offline
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Use some Techron as the fire starter? crackmeup


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Re: Cleaning Coated Cast Iron Grill Grates [Re: 4WD] #5323590 01/15/20 03:01 PM
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Dave9 Offline
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I suspect you are just using the wrong brush. I've used the same coated grates about 20 years and just soak them in hot detergent solution then a steel wire brush, then if I want them spotless I soak again a bit longer and use steel wool.

Since you have a large buildup, it will be much easier to do next time, going forward with less to remove. If you get pretty much all the crud off, it doesn't soak up protein juice or grease and oil that varnishes each time you cook to turn into such a stubborn mess.

Last edited by Dave9; 01/15/20 03:02 PM.
Re: Cleaning Coated Cast Iron Grill Grates [Re: Danno] #5323790 01/15/20 06:50 PM
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Originally Posted by Danno
Submerged in vinegar and baking soda is my go to.
Also, when firing up the grill, when thd grates are hot, use bbq brush with a good amount of snow on it, run on the grills and they steam clean. Finish cleaning with a lightly canola oiled pad of paper towels.


I’d have to maybe get a Slushy for the snow ? Or come up with steam production ?

Re: Cleaning Coated Cast Iron Grill Grates [Re: Dave9] #5323793 01/15/20 06:51 PM
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I will not use a wire brush … guy at work went to ER over that … very hard night for him and the family …

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