As stated before, 8 hours should be enough time to get the vast majority of your crystals, but 20 should be more than enough time in the freezer.
After you pour the solvent through the coffee filters and scrape as many crystals from the side of the jars as you can with a spatula, there will probably still be a significant amount of x-tals stuck to the jar that you just won't be able to get out no matter how hard you try!! Next step......
Time to make some spicy weed!! (other herbs will work as well) Buy some IPA and pour it into your first extraction jar, cover it, and swish it around until all of the xtals stuck to the side are re-absorbed into the IPA. I don't know how large of an extraction you are doing, but proceed to just transfer the IPA from jar to jar until you have gotten all the xtals out of your jars.
Now pour the dmt saturated IPA into a bowl, and drop your high grade MJ (personal preference

) into the IPA. Stir the MJ around until it is all evenly saturated, then place this in a safe place for about 3 days, or until there is absolutely no scent of IPA left on the herb. Then, you can proceed to smoke your spicy weed, enhanced leaf, or changa (if you used a blend containing harmalas)with a huge smile on your face. You'd be surprised how much dancing room lighting up a fat enhanced leaf joint at a festival will get you
Peace and happy journeys