I wash them daily... if its 2 pads.. then its a small load... If I wait with the 2 pads and not wash them right away.. I place them in the laundry room folded.. pee side inward..lol.. and once I have 4 I wash then.. I do wash them daily,,,,, this way there always clean... Works well for us this way...I have 6 furkids.. so my pads get used ALL the time,,