Looks like you just have to use boiled water to make clean ice: http://www.instructables.com/id/make-crystal-clear-ice!/ http://www.instructables.com/id/make-cr

Looks like you just have to use boiled water to make clean ice: http://www.instructables.com/id/make-crystal-clear-ice!/ http://www.instructables.com/id/make-crystal-clear-ice!/ And bars already have a "boiling machine" (cafe machine) :)