Use a foaming cleanser. It connects to the drain tube and fills the entire AC system with cleansing foam. I use two cans. The stuff that comes out is gross.


Lubegard 96030 Kool-It Evaporator and Heater Foam Cleaner https://www.amazon.com/dp/B0007PHD0S/ref=cm_sw_r_cp_api_i_.kRTEbZJ0P31S

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Satan creates nothing: he only ruins everything. He does not invent: he tampers. And his followers are no different ~ Archbishop Carlo Maria Vigaṇ

I love this product an also viper foaming coil cleaner in a can, it is a lot of product but you will need to work up something to get it in there

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)