A method of analyzing molecules using a nanopore array including a plurality of cells included on a chip is disclosed. Nanopores are caused to be formed in at least a portion of the plurality of the cells. A first physical measurement of the nanopores is evaluated. It is determined whether to cause the molecules to interact with the nanopores. At least a portion of the nanopores is caused to interact with the molecules. A second physical measurement of the nanopores that indicates a property of the molecules is evaluated. It is determined whether to cause the nanopores to be reformed so that the cells may be reused to interact with additional molecules.