Did using Vodka as antifreeze do this to my filter view cap?

ragtag2

We had some below freezing temps in the Adirondacks last month... Special thanks to @WilliamA for the easy 7 steps for winterizing (posted October 2018). Being a diligent new T@G owner I drained the water tank, blew out the lines and then put some vodka (instead of RV antifreeze) into the filter/pump just to be on the safe side. Using vodka was suggested in some winterizing posts I read and makes great sense to me instead of needing to use copious amounts of water to flush non-toxic antifreeze.

The cold weather came and went and we refilled the water tank, purged the air and vodka and proceeded to drive back to Seattle. Somewhere along the way, we noticed that the clear filter cap was no longer clear...  I figured maybe some of the water we put in might have been particularly hard and it was just some scale on the inside of the cap, surely soaking in vinegar would take care of the issue.



Amazon sells the SHURflo unit for about $8, much cheaper than just buying the cap alone. So, I bought one and it made swapping caps much easier...  

Here's what the inside of the cap looks like after soaking 6 hours in white vinegar. 


The interior is super smooth and not scaly like a teakettle would get. It was Tito's vodka...  

Does anyone else have experience/remedy regarding this? Just curious.