I try and get them as clean as I can using basic methods. The above lot are pretty clean by my standards.
I like clean bottles, but am very fond of nicely Payk ones:
Same bottle drying, apres bath:
I don't have, nor really want a tumbler. That being said; i do have several bottles that would benefit in appearance, and dare I say, value, were they to be professionally cleaned.
Here's one such:
Just a tad of sickness that does, IMO, negatively effect appearance, and value at point of sale.