I have had a tumble dryer in the garage as we are renovating. Plugged into extension reel along with washing machine and both keep tripping if used together. Noticed that the tumble dryer cord was caught under the machine and was warm as the machine was on. No cuts to the cord but it is slightly squashed. Will this be safe? I will not plug it into the extension reel again but worried the wires inside the cord could be damaged without me knowing.