Chicago’s window washers went on strike Monday to demand higher wages and better benefits. About 260 window washers represented by Services Employees International Local 1 were covered by a three-year contract that expired on Saturday. Negotiations for a new contract continue. The union is asking for starting wages to increase from the range of $12-$20.50 per hour to $16-25 per hour. It is also seeking increased life and health insurance coverage. The union is also calling for this contract to last three years as opposed to five sought by employers. “We don’t know what the economy will be in five years, so we’re trying to secure a good foundation, a good contract,” said Cruz Guzman, a second-generation window washer. The strike will continue until a new contract is reached.