The moths go after the starch when things are stored away. They like to eat it.
I think the kind that you are getting now has to do with the season. IMHO
packets af cedar blocks and bags of chips, etc. are at Bed Bath & Beyond.
I personally make sachets from fabric scraps and gerbil bedding from Walmart. It is cedar shavings and one cheap bag makes scads of sachets. Sometimes I make them pretty for friends and sometimes I just use muslin scraps for storage closets.