My hot water tap leaks and I want to change the washer but I can't undo the retaining screw on the tap head. When I tried to turn it, the screw head seemed "soft" and it kind of collapsed. It's now impossible to get a strong enough grip with the screwdriver. Is there a tip for removing the screw? I've tried sawing into the groove with a sharp knife but it barely touched it. I don't really want to replace the whole tap.
Thanks in advance.
Thanks in advance.