discolored kettle?

[zodiak3000]

i have had the same kettle for about 3 years. always took care of it by scrubbing with the green/yellow scotch brite pads. i typically apply bar keepers friend every 3-4 or so batches when scrubbing. noticed a discoloration of a "rainbow effect" on the kettle this last time. never seen this before. anyone know whats going on here?

 

[Ski12568]

I believe the rainbow color is from being exposed to high temperatures. If the barkeepers friend isn't working, try lemon juice.

 

[flars]

The discoloration is permanent if caused by over heating. Lemon juice is recommended by Calphalon if BF doesn't do the job. Calphalon also recommends a non abrasive sponge for cleaning the stains.

 

[zodiak3000]

thanks for the responses. im guessing no chance of off flavor from the discoloration though?

 

[Ski12568]

Couldn't say, but I doubt it.

 

[maierhof]

It could be protein buildup - i see it all the time. try a quick rinse with hot pbw to make sure it is not from that first. Then do the lemon juice if it is still there afterwards... Oh and ScotchBrite makes a BLUE backed sponge which are great for stainless. Green backed ones scratch the s#!t out of stainless...