Removing Impossible Dried Sediment From Wine Bottles

I was losing a fight with these bottles for days until I finally found something that would clean off these bottles. It took a soak but with minimal effort, I figured out a reliable way to get these used bottles sparkling clean.
If you have a local brew shop or can pick up used equipment do so, for everything else you can't find, I've listed them below.
Affiliate Links
Wine Shrink Caps - amzn.to/3LI4wkn
Wine Making Supplies
6 Gallon Primary Fermenter - amzn.to/45hYca7
Bung - amzn.to/3LPEY4V
Airlock - amzn.to/3ZGrUVc
Mixing Spoon - amzn.to/3to6pN2
5 Gallon Carboy - amzn.to/3RMag0m
Carboy Cleaning Brush - amzn.to/48R090u
Auto Siphon - amzn.to/3RR4b2V
Campden Tablets (potassium metabisulfite) - amzn.to/48HiBbO
Campden Tablets (sodium metabisulfite) - amzn.to/48H3Rd2
StarSan Sanitizer - amzn.to/3LPDzvb
#9 Corks - amzn.to/48HT9Ti
Bottle Filler - amzn.to/3ZJzDSj
Wine Thief - amzn.to/3PJX8WN
Graduated Cylinder - amzn.to/3teZKo1
Wine Hydrometer - amzn.to/3thk9ZU
Hand Corker - amzn.to/46fuyE1
Floor Corker - amzn.to/3tjJy50
Wine Bottles (Clear) - amzn.to/45iT3i0
Wine Bottles (Green) - amzn.to/3RGdanm
Wine Bottles (Blue) - amzn.to/46ySfH5
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[@jeremiahbullfrog9288]

Caution, sodium hydroxide can dissolve glass. Probably fine the way you're using it, but something to be aware of?

[@QualityHomeWinemaking]

That's good to know, thanks for sharing.