Obvious new guy here but series Rover number six.......

I am having a stretch of bad luck with brake light switches. I have replaced two in less than a month and now this one is not working. Did all the wire to wire and everything is working fine with brake lights working. Have had it out several times and tried it that way and not working. Am i having a stretch of just bad switches or do you have any other thoughts? Getting them from host and works good for about a week and then nothing. Thanks for any ideas.