Brake light switch???

Hello All,
My BLS is the snap in kind, it works fine(when it wants to) so the Brake lights stay on unless SOMETIMES I reach down and pull switch in line with pedal,(I know everybody's saying
Bracket outta line etc) Fact seems brake pedal has at LEAST 1/2 " slop returning to the top!
Resulting in my switch not working properly, I went and bought an adjustable switch and still a bit of SLOP! Brakes are manual drums rear discs front 69 Dart, is MC bad? Rod ? Brakes work fine.main issue seems pedal not returning to top to depress switch!! ???
Thanks
Mitch