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This undated photo provided by Carlsbad Caverns National Park shows a bag of Cheetos that was dropped off trail by a visitor in the Big Room at the national park near Carlsbad, N.M.(Carlsbad Caverns National Park via AP)

This undated photo provided by Carlsbad Caverns National Park shows a bag of Cheetos that was dropped off trail by a visitor in the Big Room at the national park near Carlsbad, N.M.(Carlsbad Caverns National Park via AP)

FILE - Hundreds of cave formations are shown decorating the Big Room at Carlsbad Caverns National Park near Carlsbad, N.M., Dec. 18, 2010. (AP Photo/Susan Montoya Bryan, File)

FILE - Hundreds of cave formations are shown decorating the Big Room at Carlsbad Caverns National Park near Carlsbad, N.M., Dec. 18, 2010. (AP Photo/Susan Montoya Bryan, File)

This undated photo provided by Carlsbad Caverns National Park shows mold growing where a bag of Cheetos was dropped off trail in the Big Room at the national park near Carlsbad, N.M. (Carlsbad Caverns National Park via AP)

This undated photo provided by Carlsbad Caverns National Park shows mold growing where a bag of Cheetos was dropped off trail in the Big Room at the national park near Carlsbad, N.M. (Carlsbad Caverns National Park via AP)

This undated photo provided by Carlsbad Caverns National Park shows a bag of Cheetos that was dropped off trail by a visitor in the Big Room at the national park near Carlsbad, N.M.(Carlsbad Caverns National Park via AP)

This undated photo provided by Carlsbad Caverns National Park shows a bag of Cheetos that was dropped off trail by a visitor in the Big Room at the national park near Carlsbad, N.M.(Carlsbad Caverns National Park via AP)