I agree with everyone else on the several days of soaking. But I would cautious you not to use the laudrymat for a bigger machine. True the machines may be bigger but you could actually end up getting more dirt residue from the laudrymat than getting it clean. When so many different types of soap are used in machines like that plus you never know what was previously washed in it before you use it and you could end up with gunk from that and the excess soap build up.