You can keep it optimally dirty to avoid some insects (the ones who avoid mammallian products) and only deal with the ones which seek human smells/other molecules.
You can keep it optimally dirty to avoid some insects (the ones who avoid mammallian products) and only deal with the ones which seek human smells/other molecules.
Sounds like a constituion/lawmaker problem to me if he won/settled (i.e. paid to win).