-Wear goggles and gloves.

-Take all the cups in a bucket containing 1% Sodium Hypochlorite

-Wash the cups under running tap water.

-Now wash the cups with de-ionised water for 4 consecutive times.

-Get rid of all the water in cups and keep them in a tray.Tray should be covered with Gauze piece. -Keep the tray in an incubator until dry at temp of 37'C(DO NOT USE MORE THAN 37'Because high temp change the shape of the cups).

-Now the cups are ready to use.