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Hello Everyone.

Thank you to everyone who replied. I received so many responses, it just
wasn't possible to respond to each of you individually.

It was unanimous, the Fruity Pebbles and Corn Pops are the most likely
culprit (cross contamination in production factory), although everyone
agreed that licking the envelopes probably didn't help. I tried Gorilla
Crunch like many of you suggested, and I love it.

Best wishes and Happy Spring!

Deb