Those of us who live in hot climates often sweat profusely during davenning. Talit are obviously an aggrevating factor. In my case, this is already discoloring the bottom of the shel rosh beit of my brand-new pair of tefillin. I am worried this will lead to the premature possuling of the battim.
This source suggests allowing the beit to dry overnight, then applying a thin layer of vaseline once or twice a week to avoid moisture damage to the beit. Other internet sources suggest olive oil used in the same fashion.
Has anyone found a good solution to this problem? I am rather hesitant to apply petroleum jelly or even the finest of extra-virgen olive oils to my new, expensive set of tefillin on the say-so of a single website, I am also rather anxious to protect a beautiful shel rosh beit and the texts inside it.