Cannabis is fat soluble. Soap is primarily made from fat. The soap will just stick to the reclaim without washing it off. My friend can't figure out why my glass is sparkling clear (ISO) and his is yellowed (dish soap) - when we both use distilled water.
To clean reclaim you need to use something that is non-fat soluble, like isopropyl alcohol (and kosher salt can be added as an abrasive). I'd stay away from chemicals like Simple Green and PBW which could leach into the tubing/air-path; use those for glass which doesn't leach and can be rinsed clean.