I will often say that a ceramics studio will never be clean. There is simply no way to remove all the residue of clay dust from every surface, and if there was (and maybe there is) it wouldn't be worth it. Though it will never truly be clean, it is certainly in constant danger of becoming absolutely filthy.
That's why it is routinely swept, mopped, and has it's many surfaces sponged almost daily. For mid-summer to December 31st (or "officially" until November), I fight a constant battle to keep the studio surfaces at a light clay film instead of splatters, dust, and trimmings littering the floor.