Here are some of the best answers from the thread.
Thanks for the tip, Psydaranta.
Adult pads might be even cheaper, says kurinevair666.
Gerber cloth diapers work as burp cloths, says junter1001.
Dont buy grilling gloves, says _hellonasty; buy welding gloves.
Everything related to pools is a giant money grab, says jreed26.
For example, instead of pool salt, you should just buy plain bagged salt at Costco.
Tractor Supplygets named a lot in this thread.
of pink Himalayan rock salt at a Tractor Supply store in the horse section for like $8.
For dry and cracked heels, Grandmapoppy recommends Tractor Supplys bag balm instead of foot creams.
Hardware stores are good for plenty of cheap supplies, including art supplies, according to Milkshimmer.
All you need is school glue and water for the same effect.
Dish soap for cells if you want em.
Sashabybee adds, If you need quality paint brushes, use makeup brushes!
Are you podcasting or recording music?
Instead of dressing your room in sound blankets, get moving blankets, says CharlesWiltgen.
(Dilute it and work your way up, according to your comfort level.)
Instead of floor pillows I buy giant dog beds, says okdennvm.
Melamine foam is a cheap alternative to the Magic Eraser sponge, says harleyquinn1234.
A few people warn that it can crumble, but that its still worth the savings.
Common misspellings often go under the radar on eBay, says spinja187.
A few years back we got a beautiful kayak for dirt cheap, says allthoughtsaside.
The guy couldnt understand why no one was coming to see his Cajyck off of Craigslist.
Check for common typos withTypoHoundandFatFingers, says MOGicantbewitty.
Water bottle cleaning tablets?
Basically denture cleaning tabs, says BlondeLacey.
They work amazing but may make your water a bit minty.
Baby oil makes a fantastic and inexpensive substitute for shaving cream, says wiredandwiser.
Purozero and jmad888 prefer cheap conditioner for this, and VerbalThermodynamics uses a shaving soap.
And baby wipes work as makeup wipes, says hyeonmibeans.
Use silicone spray instead of waterproofing spray for waterproofing fabrics and materials, says Asstractor.
Dont get cutting board oil for your wooden cutting board, says redhotjose9.
Use food-grade mineral oil.
Clownhooker (look, I dont choose the usernames) says rubbing alcohol makes great white board cleaner.
BlastedTrash268 says you should dilute it to 70% to avoid wearing away the finish.
You missed the obvious, youre saying.
Cant wait for this user to ask a question in a Presidential town hall some day!
Read the whole thread at r/Frugal.And remember to double-check ingredients and components before you try an unusual substitution.