Cleaning bottles

So I was on walking down a river that flows into Manchester, England when I stumbled across some disturbed earth with lots of these bottles in. There were so many I could only take home what I could fit in my pockets, so I grabbed the best ones. Fortunately the tall blue one says Gartons HP sauce which I’ve managed to date to 1895, so I’m guessing they’re roughly late Victorian.

My question is, other than two short ones which seem to a kind of glaze or something on them, how would I go about cleaning the taller ones so they come out as clear as some of the ones in this sub? I’ve given them a good scrub with a toothbrush and washing up liquid but that’s as clean as I could get them.

Thanks for any advice, I think I’ve found a new hobby.