...considered normal in spas / beauty salons etc?
Last two places I've been to for a pedicure they've gone to use a nail file that was dusty as if it had previously been used on another customer. Are there guidelines around this? When I asked if a fresh one could be used they looked as if I was making a bit of a fuss.
So as not to dripfeed, I got cellulitis in my toe after a pedicure which needed antibiotics. The GP blamed the pedicure, but who knows! It has however, given me a healthy dose of paranoia around beauty treatments 
I've just been giving a really generous voucher from collegues for a full pedicure to one of the salons above (scrubbing, filing of hard skin, trimming cuticles etc) so I wanted to check now. What tools can be reused? What should definitely only be single use? Does it even matter?
Can I just throw caution to the wind and get nice new shiny feet for summer?