really depends on the bowl u have...i use 2 dif. knifes,toothpick,an a cotton swab with the cotton off of it an the scrape forever lol...if u use a screen your resin will be more gooey an runny so you will need to let it dry a bit before u smoke it otherwise it will run right threw your bowl or clog your screen hardcore..an last but not least smoke small bits at a time if u try an smoke a whole lot at once the outside gets hard before the inside is done