I have just brought a 2nd hand crib with mattress, now i was going to buy a new mattres but it has cleaning instructions. It is a mamas and papas with removable cover and the inner can be cleaned with antibacterial wash. If i washed the cover on 60 and washed the inner with antibacterial then maybe wipe down with some milton, do you think this is ok?? or am i being stupid and cheap and should sling it and go and buy a new one?