I just rented a bass and the bow that they gave me with it is brand new. But I cannot seem to get a good tone on it, this is not because of teqnique (I can get it with the bow at school). The sound is often raspy and dead. It gets a little better when I put some rosin on it but only lasts a few minutes. Is this the new bow, a crappy bow, the bass, or dead strings?