Paraphernalia - Do you save and harvest your cottons?

[Chromo]

My pet lizard and his friends are divided on the merits of saving their cottons (or whatever the filter material may be) that they use in the process of preparing shots of heroin. My pet lizard's experience is that it seems rarely worth it to harvest cottons, even when withdrawing they never seem to help. There was one time where he found a cotton he had been reusing that had quite a lot of tar ran through it, and it happened to give him a decent shot. That seems to be the exception rather than the rule though for him. The typical cotton that's been used to filter a bag or two doesn't seem to do anything for my lizard if he reuses and harvests it.
He has a few gecko friends however who are always asking for my lizard's cottons and the residue left in spoons, and who seem to get some benefit from it. They have the same or higher tolerance than my lizard so.. he's asking for SWIY's experiences with this and if it's ever been worthwhile. In safety terms he's aware that one should use a new filter each time and would always recommend that, but has SWIY ever reused cottons multiple times in order to "save up" the heroin inside for when one runs out; if so how much does SWIY run through a cotton, and how much does SWIY feel a harvested shot?