In terms of maintenance, both uPVC and aluminium outward-opening front doors require little upkeep due to their sleek, durable surfaces. To remove any build-up of dirt we suggest that warm water, washing-up liquid, and a lint-free towel are used. All parts, including fittings, should be cleaned before being left to dry. Washing-up liquid is ideal for this as it dissolves grease but is still mild. Hinges should then be lubricated once a year to ensure optimum operation.