Is my "strobes" switch going bad?

[helitim]

Noticed this afternoon that my wingtip strobes stayed on when the master switch is on.  I turned it off and on a couple of times before they finally stopped flashing.  Used some contact cleaner to try and clean the switch hoping it might resolve the problem but the switch appears to be fairly well sealed from what I can see.  Other than replacing the switch next, is there any way to test it for function before ordering a replacement?

Thank you,

Tim

[Mark89114]

Another thought, does the switch control a power relay that might be sticking?  

[helitim]

As it turns out, the answer is no.  Upon closer examination a clip had fallen down onto the switch from a recently replaced altimeter causing a direct contact between the strobes switch and the buss bar.  Fortunately, no other damage appears to have been done.