Howdy Cowboy
I wouldn't squeeze the shirt or whatever filter you're using directly into the glass that you are going to drink the solution from. Squeezing it can push through more paracetamol.
As codeine is water soluble, all you want is the clear liquid. You can squeeze the shirt/filter into another secondary filter to get the liquid which has soaked into the original filter. But don't squeeze the final filter into the drinkable solution. Especially if you have juice in there which makes it hard to tell how clear the solution is.
Paracetamol can cause damage which isn't obvious soon after ingestion - even if it's a large amount. If you're doing regular (or semi-regular) CWEs, you want to limit the amount of paracetamol you intake as much as possible, because that shit adds up and hammers away at your vital organs.

When I went to squeeze the remaining Codeine out a bit of white sludge leaked out of the shirt and into the juice
I wouldn't squeeze the shirt or whatever filter you're using directly into the glass that you are going to drink the solution from. Squeezing it can push through more paracetamol.
As codeine is water soluble, all you want is the clear liquid. You can squeeze the shirt/filter into another secondary filter to get the liquid which has soaked into the original filter. But don't squeeze the final filter into the drinkable solution. Especially if you have juice in there which makes it hard to tell how clear the solution is.
Paracetamol can cause damage which isn't obvious soon after ingestion - even if it's a large amount. If you're doing regular (or semi-regular) CWEs, you want to limit the amount of paracetamol you intake as much as possible, because that shit adds up and hammers away at your vital organs.