Couldn't be easier
March 17, 2019
I love these. After years of using other methods to try and hydrate my guitars, this product is so easy to use and has taken all the worry and guess work about whether there is too little or too much humidity in the case. After about a month of use the humidity in cold and dry northern New England, the RH in the case is always at 49-50%.
May be a little pricey but in my opinion the piece of mind is totally worth it.