Filo can be quite hard to work with, as it can tear easily or become dry. When practising this technique it is necessary to cover the unused filo sheets with a damp cloth. To bind the filo sheet together, melted butter is commonly used, but flavourless oil can be a substitue, but remember to brush each sheet liberally with butter to make it easy to shape. Practice this technique using Alyn Williams' chicken christmas cracker or Paul Ainsworth's raspberry meringue pie.