Trying to design a circuit that can reliably detect a situation where a child wets their bed. The 3 key requirements are --

1. Reliability of the approach
2. Ease of use, i.e. a no-fuss approach
3. Child's safety (from harm) due to electronics

Can the soil moisture detection technique be used ?
How can I make this easy-to-use given s.t. while changing bed line ? This shouldn't require messing with the device, rewiring etc.