At the quantity the OP might use, buying by the gallon might make more sense - having a look to Amazon, the popular concentrations in gallon+ sizes are 70% and 99.9% (about the same price, $25 USD/gal) - it probably makes more logistical sense to go with 70% here to reduce evaporation and increase usable liquid on these tall, thin objects (so let’s say “sloppy use” of oddly shaped hard to handle glass).
I’ll leave my update at 70% concentration as the more economical choice - I’d presume based on their comment a soak in ZAP ($18 USD/gal) first is needed, then followed by the iso method… so it’s a little expensive no matter what for something they might not care about that much.
As a sort of historical side comment regarding your concern about misinformation - “how much does it cost to register one?” has been the litmus test to use for a long time (I’m of an age). More specific to
.info
, it was one of the very first “new” TLDs introduced in 2002/2003 and the owners basically gave away millions of domains for free to gain market share.[1]This led to a lot of scammers, hackers, malware and whatnot infecting the entire
.info
TLD and it was in trouble by having the entire thing blocked even around 2012, almost 10 years after introduction.[2] It was troubled with new “crackdowns” (enforcement rules) as well due to it’s overwhelming use for nefarious purposes.[3]Ad-hoc data from my own employment experience, in 2024 it’s still 100% blocked (like ref[2]) by corporate firewalls who leverage strict rules along with many others who had the same troubled history (
.xyz
to name one) and the whole list of “free” domains. However,.info
now generally costs $20 USD/yr (with many places offering first year discount for less than $5 USD) so I think it’s trying to turn itself around.Point being, “unrestricted” TLDs which are super cheap have had the historical tendency to attract scammers, phishers, malware and other nefarious entities because the cost of doing business at scale (these guys register hundreds of domains to churn through for short periods of time - “keep moving, don’t get caught” i.e.). Having lived through this whole saga, I open all TLDs I know to be cheap/free in private/incognito tabs and treat them with suspicion at first.