I'm not sure what the problems is, but when we moved over a year ago I cleaned out the parts washer in preparation for the move. I figured once I'm set up in the new garage I could just walk into the local TS and get the standard 5 gal PSC 1000 Parts Cleaner that I've been using for years. It's the most reasonably priced low odor solvent that I've been able to find, and it works very well in the very common imported HF style 20gal washers.
https://www.tractorsupply.com/tsc/search/psc%201000%20parts%20cleaner?Problem is that the solvent was/isn't available across the country. I've tried to find the stuff for almost a year, but was told that it wasn't available, and they had no idea when/if it would be back in stock. One TS employee told me that people across the country are hoarding it. As to why that is, he couldn't say.
As luck would have it, I did my regular online checks today and found two 5 gal cans available in the area and bought them immediately. I had them shipped to my local TS and picked them up a few hours ago. At $44/5gal can this stuff is a bargain when compared to CRC $133/5gal from nearby Advance Auto, or ZEP $149/5gal at Amazon or NAPA.
Any of you knowledgeable gents have any insight into this? Every time something like this happens, it's often a good indictor that the EPA is getting involved and people are getting nervous.