It is easy to make distilled water in your home. The best way is to take a big pot and fill it 1/4 full with any water. Now take a round bowl (like a mixing bowl) and let it float in the water and cover. Heat water until droplets start to collect on the lid and start to drip into the bowl(a slow simmering boil) Any water collected in the floating bowl is distilled water !(water that is made into steam and collected from the droplets of water that falls into the lid).
If you don’t have a mixing bowl handy you can use two lids or even aluminum foil. Put water in a pot and cover. Bring to a slow boil and cover. When droplets collect on lid put the other lid immediately on the pot and collect the water from the first lid that had droplets on it. Keep repeating the process until you have as much distilled water that you need.