I harvest them from my RF board . <| sep |> First world problemsit ' s racist , sexist , xenoislamohomo phobic to imply your world is first and that other worlds are somehow lesser than or naturally beneath it , please don ' t use such damaging language to perpetuate the normalization of our white colonial patriarchal past third world people have first world problems too , and you erase them by elevating others <| sep |> I clean mine after each use by spraying Sephora brush cleaner on a tissue and wiping them down . Then once every month or two , I give them a proper wash . I swish them in melted coconut oil to remove the makeup , then use antibacterial hand soap to sanitize and remove the oil . They usually dry in about 24 hours so I will put on my makeup for the day and then wash them .