Did I ruin my pressure cooker?

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  #1  
Old 03-11-16, 11:19 AM
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Did I ruin my pressure cooker?

My pressure cooker looked spotless before, but I figured it needed a clean after months of unforgiving abuse.

Instead of hand-washing, I ran it through the sanitation cycle of my dishwasher, and it emerged from the hot bath stained with spots, looking much worse for wear.

Did the wash ruin the smooth finish on the pressure cooker? What can I do to restore it to its former glory?

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  #2  
Old 03-11-16, 11:21 AM
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Welcome to the forums.

Is that stainless steel or aluminum ?
It looks like calcium stains.
 
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Old 03-11-16, 11:33 AM
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It's certainly possible you ruined the finish, especially if it's aluminum (leaning toward it not being Al). I would try wiping it down with vinegar to see if you can remove any of the spots, meaning they were a deposit. I'm leaning toward those being defects, though.
 
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Old 03-11-16, 11:38 AM
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Thanks for the welcome, guys, I really appreciate your help.

Looks like it's made aluminum... should I take a shot with the vinegar?

It's this model:
http://www.amazon.com/Presto-01781-2...dp/B0000BYCFU/

It looks stained, but not warped. Is it best to hand wash aluminum?
 
  #5  
Old 03-11-16, 11:53 AM
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Yes, it's best not to put aluminum in the dishwasher - you can get pitting, which is what I'm afraid you have here.
 
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Old 03-11-16, 11:58 AM
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I think you're right.. is my best recourse some vinegar and elbow grease?
 
  #7  
Old 03-11-16, 12:06 PM
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I think the surface is damaged, vinegar would only help if you were seeing the accumulation of materials, like calcium, on the surface.
 
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Old 03-11-16, 02:47 PM
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Dishwasher detergent is highly alkaline, alkaline attacks aluminum. Never put anything made of aluminum in a dishwasher
 
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Old 03-11-16, 08:30 PM
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This from the Presto owners manual. Absolutely no mention of keeping it out of the dishwasher.... unless I missed it. go presto/downloads/instructions/01755.pdf

The outside surface may be kept bright and shiny by cleaning with a good silver polish or simply by washing with soap and water. Iron and various minerals in water and foods may darken the inside of the canner, but this discoloration will in no way affect food cooked.

These stains may be removed by using a solution of water and cream of tartar. For each quart of water, use one tablespoon cream of tartar. Pour enough solution into the canner to cover the discoloration (do not fill over ⅔ full), then close cover securely. Place regulator on vent pipe and heat until 15 pounds pressure is reached. Remove canner from heat; allow canner to stand two to three hours. Remove regulator, open canner, and empty contents. Scour thoroughly with a soap impregnated steel wool cleaning pad; wash, rinse, and dry.

Due to the acidic nature of the water supply in some areas, deterioration of the interior surface of the canner body may occur. To minimize this effect, thoroughly scour the inside of the canner body with an abrasive cleanser at least once a year.
 
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Old 03-11-16, 10:42 PM
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Unfortunately, no mention of putting it in there, either - they seem to have avoided the subject entirely.
 
 

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