Potentialy spoiled methadone?

So, i'm in quite a pickle. Doe to loss of insirqnce i ran out of my prescribed methadone. In out clinic we get liquid methadone (methadone hydrochloride) mixed with orange syrup, that went brownish-black. On top of that I also ran out of amy usefull benzodiazepines. Only thing I have left is 0.12mg of Xanax, 15mg of oxazepam i got from friend (used for the treatment of anxiety, insomnia, and to control symptoms of alcoho withdrawal), and 17 tablets of 5mg nitrazepam (hypnotic drug of the benzodiazepine class used for short-term relief from severe, disabling anxiety and insomnia. It also has sedative (calming) properties, as well as amnestic (inducing forgetfulness), anticonvulsant, and skeletal muscle relaxant effects). My question is, as I was able to taper down methadone dose to about 5mg daily during last month, would it be safe to filter what I assume I spoiled methadone using sterisept+, which should filter bacteria, fungi and solids, and potentially boiling the filtered solution to be extra safe. Now on the internet I found claims of boiling braiking down methadone, but I had a friend tell me he knows of people boiling the solution downd, I think for shooting purposes, as that also caramelized sugars from syrup. To be clear I DO NOT INTEDNT TO SHOOT ANYTHING BUT TAKING IT ORALY AS ALWAYS, AS I REALLY CANT STAND NEEDLES ANYWAY. Does anyone have any experience doing that, or should just filtering solution be enough to get rid of potential harm. To be honest I'm not even concerned about anything other than potential botulism, as taking 5mg of methadone would equal just to about 3ml of solution, and that would carry me through another whole month, potentially completely tapering methadone off, or at least giving me time to fix my insurance. I'm also not in position to buy anything on streets, 1st due to rising cost this year and 2sn duo to being to broke at the moment anyway. Any recommendation based on experience would be greatly appreciated. Or any other idea on how to tackle this problem with what little benzos I have in stash, and potentialy combining with alcohol as I have lot of spirits, liquers and wine stashed as well.

Thanks to everyone on any helpful advice.