First of all you should probably check that there really *is* 'cross talk' - perhaps by attaching one of the cheap chinese logic analyzers to your system.
Depending on your setup a pull up / pull down resistor around 10k might be able to supress the noise in your wires while still allow the end stops to be detected.
Do you have the internal pull ups of your board turned on? If not, they should be - but they're very high resistance, so they might not be enough.
Depending on your setup a pull up / pull down resistor around 10k might be able to supress the noise in your wires while still allow the end stops to be detected.
Do you have the internal pull ups of your board turned on? If not, they should be - but they're very high resistance, so they might not be enough.