Glazing Warranties

Many Lancashire residents have been sold warranties on their double glazed windows or doors. These typically offer annual maintenance and cleaning, and may cost thousands. Sometimes they are re-sold or "improved" on annual sales visits, at extra cost. While selling such warranties is not illegal, it is advisable to think twice before signing up to such contracts- is there anything included that your local window cleaner or locksmith could not do when required at a fraction of the price?