Homeowners should avoid carving pumpkins over the kitchen sink if they wish to avoid turning Halloween into a plumbing nightmare, an expert has said.Stacy Miskew of Mr Rooter Plumbing in Edmonton, Canada, noted that when pumpkin pulp is washed down the kitchen sink, the substance hardens and sticks to the pipes, leading to clogged drains and potentially a broken waste disposal system.Speaking to the Edmonton Journal, the expert warned Instead of carving your jack-o-lantern in or by the kitchen sink, try a newspaper.You need to be cautious when removing and disposing of the pumpkins sticky substance.Earlier this month, Camilla Chafer, acting editor of parenting website TheSchoolRun.com, suggested that families can enjoy a host of Halloween-related activities without having to leave their homes.She claimed that the kitchen or living room can play host to a number of fun activities including making witches hats, carving pumpkins and having a spooky movie night.