TECHNOLOGY FOCUS - BIOTECHNOLOGY - Preferred Polypeptide: The polypeptide has at least 80-98% identity to SEQ ID NO. 11 or at least 75-98% identity to SEQ ID NO. 12 or its fragment or variant having ferulic esterase activity. The polypeptide is obtainable from Chaetomium thermophilum or Melanocarpus albomyces, preferably from C. thermophilum CBS 132416 or M. albomyces CBS 132099. Sequences not defined here may be found at ftp://ftp.wipo.int/pub/published_pct_sequences/publication. Preferred Polynucleotide: The polynucleotide comprises a gene included in a microorganism having accession number selected from DSM 26070 and DSM 26071. Producing a polypeptide above comprises transforming a host cell with an expression vector encoding the polypeptide, and culturing the host cell under conditions enabling expression of the polypeptide, and optionally recovering and purifying the polypeptide. Preferred Enzyme Preparation: The enzyme preparation further comprises at least one enzyme selected from cellobiohydrolase, endoglucanase, beta -glucosidase, beta -glucanase, xyloglucanase, xylanase (preferred), beta -xylosidase, cello-biose dehydrogenase, mannanase, beta -mannosidase, alpha -glucuronidase, acetyl xylan esterase, alpha -arabinofuranosidase, alpha -galactosidase, pectinase, involving endo-and exo- alpha -L-arabinases, endo-and exo-galactoronase, endopectin-lyase, pectate lyase and pectinesterase, phenol esterase, ligninase involving lignin peroxidase, manganese-dependent peroxidase, hydrogen peroxide (H2O2)-generating enzyme, laminarinase, chitosanase, GH61 protein, and laccase with or without mediators. Preferred Method: The method for treating cellulosic or lignocellulosic material comprises cleaning the interior of a dishwasher by contacting at least part of the interior of the dishwasher with the polypeptide or an enzyme preparation above. The cellulosic or lignocellulosic material is textile material, plants used in animal feed, or wood-derived pulp or secondary fiber. Preferred Detergent Composition: The composition is a dishwashing machine cleaning composition. EXAMPLE - No suitable example given.