A senior staff member but two containers into the public ice maker, these where not covered or wrapped. This contaminated the drink ice for anyone want to cool their drink. I unplugged the ice maker and opened the drain and posted a sign that ice was contaminated and should not be used. I sent a private note to the staff member and told him I was ordering sanitation chemicals for the clean up. No reason to but attention staff member, he thanked me and signed for the cleaning.