infections

After 2 weeks of bottle conditioning a hard seltzer, I noticed some of the bottles have some stringy things floating on top. Does this look like an infection to you or something else? When I transferred from fermenter to bottling bucket, there was some sediment hardened on the perimeter of the...

So this may be a bit long but hopefully some of you can help me with this TLDR: Repeated infections (likely Brettanomyces) how do i troubleshoot in a public home brewery? Background: Im a relatively new brewer, made a few batches but im having a bit of a sanitation issue. I have access to a...