Don't switch OSC speed as it cretes problems in sensor mode.
Run everything at 2Mhz. Chirp sound has changed, but oh well.
Turn the thresholds all the way down. For plants that are watered more often, chirp was detecting low water because the moisturest reading was well withing margin for chirping.
Extend the light sensor range as cooling and heating is affecting leakage current of the pin, chirp was detecting low light in environments colder than 20C.