Can I use liquid hand dishwashing detergent in my dishwasher ?

No! Not only would this mean soapy suds all over your floor . . . but there’s also a technical reason why this doesn’t work. The suds created by a hand dishwashing detergent interfere with the mechanical action of the dishwasher – they “smother” the water action that’s necessary for effective cleaning. So leave hand dishwashing liquid at sink-side!