Airconditioner evaporator drain sluge w115

[Jbyron]

My AC evaporator on my 1976 240 D w115 keeps getting plugged with black slime at yhe drain where it conects to the drain hose. Any solutions or advice? Thanks.

[Jbyron]

I was able to fix the problem. I took off the air intake grill covers and sprayed lemon lysol into the fan while running. I let it sit overnight and no more problems. My drain runs great now.