Kirby G5 Vacuum power switch problems

Question

My vacuums on/off footswitch began sticking and then stayed on unless I unplugged it. I removed the cover thinking there was a contact problem and noticed an engaging bar attached to the plastic footswitch. Can you help? I'm a broke father of 2 babies and cannot afford to bring it in for service. Would like to do the repair myself. I would appreciate any help!! Without a vacuum my son will have my home buried in debri. Thank you!