Oh sorry, I missed that this was post-ice trim. QWET will definitely be the way to go to get off what's left. And when you're done with the evap to tincture strength, you'll know how strong it is!
Yes, Everclear is more expensive than the best grapeseed oil you can buy, but with the leftovers it's a better way to go. You only need enough to cover the trim. Here is Grandpa's method for QWET:
Grandpa Gets Oily! Everclear Extracts For Shatter Or Oil!
And I would gift-wrap the coco butter and give it back to your sister...the gift that keeps on giving!