its a good question,you can make them do a google on making static grass applicator they is a couple of
easy to do ones,or you can use a ballon and rub it on a jumper as well,for just just use a good PVA,wood glue,
and mix it 50/50 and brush a good coat on
i did make one quite easy to do,just messing about and work out if the cost is still much lower,but i did fine,
depending on if 2,4,6mm will work well with a tea stranger ,but for 10mm 12mm you need a bigger mesh,maybe just me.
hope it some help,