There is provided a process for cleaning wherein a cleaning sheet fed through an image forming apparatus is heated and pressured by at least one of a fixing belt and a fixing roller, and the cleaning sheet removes stains, wherein the cleaning sheet has a support and a layer containing a thermoplastic resin over the support, and satisfies at least one of the following formulae: L1 (cm)>L2 (cm) and L1 (cm)>L3 (cm) wherein L1 is a length of the cleaning sheet in a direction of feeding the cleaning sheet, L2 a perimeter of the fixing roller, and L3 a perimeter of the fixing belt, and the process satisfies at least one of the following formulae: L2 (cm)>L4 (cm) and L3 (cm)>L4 (cm) wherein L4 represents a length of a smallest electrophotographic image-receiving sheet in a direction of feeding the electrophotographic image-receiving sheet.