My first neptunes I owned I used regular tide liquid before it was HE, in the 200 ounce container, a FULL cap gave great results, and never a suds issue, the newer frigidaire with less water, I add a shot glass of tide HE, and many times it oversuds, amost considering going to a tablespoon, part could be by washer design, who knows.....but with many detergents going 2X, 3X, or more....we'll be using an eye dropper!