I'll do some research before I take it back in to anyone at this point. The shop guy did call me back a couple minutes after posting this last update and said "We won't charge you! We'll clean your car! I just need your permission to clean it!" but I'm done with them at this point. That whole "it would only cost your $140 otherwise we can't do it" conversation was the last straw.
Like you say I don't want any more damage to be done ... the first time around driving away there was tons of water dripping from inside my dash all over my legs -- which understand as part of the process there's a lot of water involved, but I was honestly worried about it getting done again because I wonder how much of that ran right through my MCU
What a horrible experience, complete waste of time (over and over again), the damage done to my vehicle during the process and the final insults of both telling me that my car smells bad and therefore they need to try and weedle more money out of me to clean it before they correct the issues that have been ongoing since the initial install 2.5 MONTHS ago.