Perhaps bugs... not the ones we eat... but Mud Daubers... a blight ... yes.. bugs do nest in the Acs.. I have found wasp nests whenever I pull the covers. There is probably enough moisture in the air in Des Allemands...so, leave doors and windows open.. run AC on full. Use a screwdriver to clear the opening of the tube... if no water, then use a shop vac to pull the water thru... use a rag covering the hose just enough to seal the condensate line... then switch on the vac... do you get any gunk out? The rag should tell you by what it catches..
Now, on our 1999 enough nests were in there that they clogged the old condensate drains inside the AC.. had to pull and flush it.. but it had a plastic pan between the AC and the roof.. have upgraded to proper drains.. but that shouldn't be your problem..
Also.. I forgot.. which way is the AS leaning??? might take more condensate to get the flow going..
Peace and Blessings..