A/C condensation leaking into passenger compartment

Footwell on passenger side 2" deep in water leaking from under dash. Problem was previously solved by technician drilling a hole somewhere in dash which enabled water to drain beneath vehicle. Warned that it would eventually clog up again with road dust, etc. But did not tell me where to check the hole in order to clear the debris.

Other owners have noted this problem on Jeep websites while I was trying to solve a different problem and I cannot find the suggested spot again.