other storage bug

my phone literally has 22 gb of "other" storage and it keeps flocculating, ill click on it and then it'll drop to 15 gb then ill reset my phone and it'll drop to 7 gb but it keeps filling back up, even up to 30 gb, i dont know what to do and im literally losing my mind. ive deleted so much off of my phone for extra storage just for it to start filling with "other", im so annoyed.