Most dishwashers have either adjustment handles or two sets of wheels/rollers on the upper tray. You can adjust the height by taking it out completely and switc

Most dishwashers have either adjustment handles or two sets of wheels/rollers on the upper tray. You can adjust the height by taking it out completely and switching to the other set of wheels. Though I have seen ones that can't be adjusted. You could try getting an adjustable upper tray from a similar make/model. Usually they are interchangeable.