All extra fees have been banned in Wales for rental properties so your landlord or agent can not unreasonably ask you to pay for cleaning fees. If you were provided with a move in inventory you need to make sure your property is as clean as it was when you moved in. If it is not as clean there can be a request for part of your deposit to be taken off you to pay for cleaning to get the property to the same standard it was in when you first moved in.