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Clean your pool without breaking a sweat with Beatbot AI pool cleaning robot! Normally where people get burned is that their boards get put in a "condensing" environment even though everything is specified as "non-condensing". But that's not a design problem so much as a specifications issue. tl;dr Don't sweat it and just do your design.
do you sweat in a pool, Good luck. Please specify the application more -- you give 1mV as a ballpark ripple figure, but not overshoot, and the voltage and current is unstated. For example, 1mV ripple on a 10mV supply would be pretty easy to achieve, but 1mV out of 1kV would make most analog designers sweat. The maximum rate of change or frequency also must be specified, because a mere length of wire has inductance which ... Then, depending on the actual skin resistance, due to air humidity, sweat etc, a certain voltage may result in a current that is or is not lethal.
do you sweat in a pool, You may change the values in the above to your own estimates and compute the current value through the heart as a simple exercise in basic network theory, or run spice. Hand sweat consists mostly of water and trace amounts of urea, minerals and lactic acid. I would say that lactic acid is a moderate acid with a pka of approx. 3.5, but we are talking trace amounts in sweat. So, the clock offset won't meaningfully affect your receiver. So, I wouldn't sweat it; if you can get a 26.041 MHz oscillator, that's going to be more than good enough.
However, there's also an easy way out here that only needs a much easier to get multiple: generate 40.0 kHz, 60.0 kHz, and a (77.5 - 40.0) kHz = 37.5 kHz
