Tenants nor reporting minor water leaks

[Krishna Chava]

This happened to me many times over. There would be a minor water leak, may be next to bathtub or under kitchen sink, but tenant never bothers to report that and by the time it was reported, it has damaged my cabinets, or worse my sub floors. I have no way of definitively connecting the dots (tenant ignored water leaks long enough) to charge the tenant. What would you do in these cases?