Looking to Speak to a Borske Sklo expert

Hello,
I'm pretty new to this website but it seems I've come to the right place. I'm in the middle of making a new chandelier with my BS globes.
I've noticed a couple things that I'd love to find out about. One in particular is that I could never get the glass in the globes on my chandelier, clean! They were always still foggy. But the ones I have collected from other lamps are crystal clear! I'm wondering if that's an indication of different ages of the globes?
Also, were the blue spots (which I've not seen in a chandelier except in mine), but that I see in vases, a color added later?
Also I saw these colors in a piece listed on CW , but in a majestic stripe pattern-was that paytern made into globes?
Thanks in advance for any thoughts.