As in, from my hairbrush? It’s long and pale brown and I don’t have a clue where to put it- sometimes I throw it out the window (maybe birds use it to nest? Or are they being strangled by it, floating surreptitiously along on the breeze??), sometimes I flush (blocks the drains?). Bin seems excessive, sending it to landfill. Maybe I could use the food waste bin, as it’s organic matter? Baffled. What should I be doing?