small blood puddle on the tile and crack, wiped it with a small towel. blood disappeared, but feared the towel now najs. I washed it under the sink in a ball shape, rinsed and rewashed, but worried I should’ve washed it flat as don't know exactly which place was used to wipe. towel still najs?

Ustadh AbdulAziz al-Haqqan

Just wash it until it goes away.