Take the lint filter out.
Underneith filter, inside and at the bottom of the agitator there is a plastic 'valve'. Valve has three spokes on it. Take a long piece of thick wire and bend one end into a hook. Hook one of the spokes on the valve and gentle pull up and out (remembering is just plastic - not too much force). May help to let machine dry out a bit to reduce the suction from the water - valve fits pretty snugly.
Underneith this valve is a 10mm screw with a hexagon head. You will need a socket and an extension shaft to get to the screw at the bottom of the agitator.
Tighten this screw and you will have tightened your agitator!
Lorna, May 2007