Just for the record guys I've been using only Shirt/T-Towel for over 8 years now. It's important to use high qualtiy/tight weave, but you can squeeze through very quickly in a couple minutes (I twist-squeeze it from top to bottom)
If you leave the resulting solution sit for a minute there will be a tiny bit of solid fallling out to the bottom of the glass - like 100mg-200mg. You can refilter if you want but I don't bother. All my solutions come out milky. I think this is because some binder parts/colourings stay as amalgamations in cold water but the warm water separates the color from the filler/whatever. If you let it settle it remains milky, so there is some soluble white part in there. I notice alot of ibuprofen + codeine pills seem to contain lactose. Definitely allow to settle and check for residue at the bottom though - sometimes an old cloth will develop a hole due to pressure/etc.
That said. I only ever use ibuprofen + codeine products. Paracetamol IMO is far more dangerous, despite it being a little cheaper. ibuprofen + codeine generally tastes about 1000x better, although I've noticed certain homebrands to have that sharp horrible flavour modifier.
I would recommend anyone else use ibuprofen too. I'm definitely not encouraging or condoning such behaviour but as a proof to its 'safety' - for a period of 9 months I was taking 50x 200mg ibuprofen once or occasionally twice a day. It didnt start like that, it built up slowly from being away in a situation i was unable to CWE. I knew that doctors could technically recommend up to 1600mg ibuprofen in 24 hours (they wouldnt do it all at once, but yeah.. wasnt that far past.) Also I DID NOT DRINK ALCOHOL AT ALL in this period. Doing so would not have been good at all. Once I took 2 nurofens before a big night out and my vomit was all night.
Anyway once i reached the higher levels I started to notice my poos changing. they got darker, but only a little. they also became super-dense. not black like i was told to watch out for, just darker than usual. You thought codeine made poos bad before... well put it this way. During this period of my life I simply did not poo in my own toilet.
It never caused stomach ulcers, but it did cause 'leaky blood vessels' in the stomach ( i presume from high doses coming in direct contact with the blood vessels in the stomach ) which eventually depleted my iron and led to me having an extremely slowly depleting red blood cell problem (over a period of about 9 months I went from RBC 150 (normal male) to RBC 47 (was expected i couldnt get out of bed, would probably have a heart attack.) Because it was such a slow change i was still going to work , still living normal life. (was sleeping alot though.. was pale white. i never lived an energetic life before so didnt notice. work was ok even though i have a light physical job). I imagine if my iron intake had been higher my body would have been able to replenish faster than I lost, although that has never been tested.
I'm not saying nobody will get stomach ulcers from ibuprofen, just giving an example of what happened to me.
Just a thought though. One wrong paracetamol dose can do permanent liver damage. One wrong ibuprofen dose is very more forgiving. Also the graph for ibuprofen solubillity says even at the mid 20ish degrees (C) (room temparture on a nice day) 250ml of water will not hold much ibuprofen (like less than 600mg IIRC) and anything 10 degrees (C) and below will be pretty similar in solubility so no need to almost freeze it. No I can't find the graph anymore guys. it was from an ibuprofen study not about solubility, but about something else. I used to have free access to journals through university but dont anymore. I left some notes in the megathread, not sure if anyone found it.
Also on the topic of CWE efficiency, use warm water to break down the pills - some of the codeine gets trapped to parts of binders but heating it up releases more of it, making it more efficient. of course dont go beyond about 40deg C or you destroy codeine. I usually use tap hot water that feels warm/hot, but doesnt 'bite' my finger, doesnt steam. (this depends on the room temperature i guess too). just beyond 'luke warm' is usually quick enough although brand name N+ is very sturdy compared to the others. cracking in half revealing an inconsistent surface will speed up teh breakdown.
After you've dissolved with warm water just use ice to cool it, far quicker than fridge/freezer.
make sure the cloth is damped with cool water though not warm or else you will allow stuff through.