I have good news for all the ayahuasqueros in nexus:

If you are in a country where ayahuasca is legal, and are close to a Santo Daime or a shamanic ceremonies center...
You can recicle the bottles leftovers for great extractions! all the residues have a lot of alks, worth being extracted!

So here is the procedure:

1- Mix the leftovers with hot acidic water.
2- Filter
3- If you are working with a very thick ayahuasca, with a lot of solid residues, repeat step 1 and 2 at least 2 more times. if you are using liquid ayahuasca, this is not necessary.
4- Make a NaOh solution by adding 20g NaOh to a cup of water, mix with your acidic water. the better the filtering, the better you will see the precipitates form. when no more precipitates come out, let it rest.
5- Filter the precipitates out of the solution, and save them. this precipitates are the harmalas, and you can proceed with any other harmala cleaning tek.
6- Add a little more base to the solution, now free from harmalas.
7- Add any NPS to the solution, and use your favorite tek to take the DMT out from the NPS.

Its easy, and you can make great changa with this.
Yesterday i smoked for the first time this ayahuasca changa, mixed with jurema, and i had a very profound experience, that i did not have in a long time with jurema alone.

Unfortunatly I forgot to take a pic of the leftover bottles, before making this tek, but i leave here a pic from the freebase harmalas, and the dmt-fumerate, yelded from a great peruvian ayahuasca.

have fun