Fill your ice cube tray with clorex bleach, next time you ned a cleaning solution it is handy, pre-measured, and non-spilling.  Depending on size of ice cubes made, you freeze clorex in tray and add the number needed.  Say you need 8 to 1 percentage just add the needed amount of water then add the need number of ice cubes, usually about 2/3 of tray for a grease spot!