Need Help From Someone in Electronics

Hey all - I have got a small string of Christmas lights I brought from home and I feel it may be broken, but I’m wondering if it’s actually broken, or if it can be fixed. The little switch that turns the lights on and off is loose, and is not turning the lights on, where as before it was staying in place firmly and working. I’d like to decorate my apartment with these lights again if possible; could I set a time with someone familiar with electronics to take a look at them? Send me a DM for my contact info or reply to this message.
Thanks a bunch,
Edward Burke, Volunteer Thurs. 3-6pm