In a typical musical instrument case, small 30 gram pouches of Music Sorb can be tucked into any area where they fit. For best results, keep the instrument with Music Sorb in a closed case. Music Sorb is completely safe. The bond between Music Sorb and moisture is contained within its solid structure, so there is no excess water that can come in contact with the instrument. In extreme cases of low humidity, the pouches may be pre-conditioned by putting them in to the supplied sealable plastic bag along with a damp towel for 24 –48 hours.