I learnt this one from a vet who came to tend a horse. She had a plastic tupperware pot with a stack of square cotton-wool pads in it, already soaking in a wound-cleaning solution, (Hibiscrub) so that she could just peel off a few pads and use them to clean the wound, chuck them, and peel off more. No delay preparing it, no faffing about with strands of regular cotton wool. It’s a great idea, so I copied it, using boiled water just in case, in an airtight tub.
I prefer to use Robinsons’ Activ Wash, which is clear, after I was told by a vet that Hibiscrub inhibits healing (but it’s very good for ensuring a wound is as clean as possible on the first day.)