I have a multi plug extension cord and last night I heard it hissing and crackling for a few moments every now and then what does this mean? Is it dangerous and
![BESTEK 8-Outlet Surge Protector Power Strip with 4 USB Charging Ports and 6-Foot Heavy Duty Extension Cord, 600 Joules, FCC ETL Listed | Walmart Canada BESTEK 8-Outlet Surge Protector Power Strip with 4 USB Charging Ports and 6-Foot Heavy Duty Extension Cord, 600 Joules, FCC ETL Listed | Walmart Canada](https://i5.walmartimages.com/asr/66da2a51-b1b2-4d0c-8b58-812eb32b57f3_1.ef95b0beff78d72e34cad9d3b42558c0.jpeg?odnHeight=2000&odnWidth=2000&odnBg=ffffff)
BESTEK 8-Outlet Surge Protector Power Strip with 4 USB Charging Ports and 6-Foot Heavy Duty Extension Cord, 600 Joules, FCC ETL Listed | Walmart Canada
![1.8M Extension Lead with USB Slots,3 Ways Extension Lead with Surge Protection and Individual Switches Power Strip for Home and Office: Amazon.co.uk: Electronics & Photo 1.8M Extension Lead with USB Slots,3 Ways Extension Lead with Surge Protection and Individual Switches Power Strip for Home and Office: Amazon.co.uk: Electronics & Photo](https://m.media-amazon.com/images/I/718Fh7-QHVL._AC_UF1000,1000_QL80_.jpg)
1.8M Extension Lead with USB Slots,3 Ways Extension Lead with Surge Protection and Individual Switches Power Strip for Home and Office: Amazon.co.uk: Electronics & Photo
![Extension Lead 2M iBlockCube 3 USB Slots | 2 Meter Cable Cord Power Strip, Wall Mount and Surge Protected | Charging Station Hub, Individually Switched, and Plug Adaptor Universal (White): Amazon.co.uk: DIY Extension Lead 2M iBlockCube 3 USB Slots | 2 Meter Cable Cord Power Strip, Wall Mount and Surge Protected | Charging Station Hub, Individually Switched, and Plug Adaptor Universal (White): Amazon.co.uk: DIY](https://m.media-amazon.com/images/I/61Nra4Hf91L.jpg)
Extension Lead 2M iBlockCube 3 USB Slots | 2 Meter Cable Cord Power Strip, Wall Mount and Surge Protected | Charging Station Hub, Individually Switched, and Plug Adaptor Universal (White): Amazon.co.uk: DIY
![Found in two of the three bedrooms at our Airbnb; both ends plug into an outlet but nothing else. The silver tag says "extension cord" and the circular end of the plug Found in two of the three bedrooms at our Airbnb; both ends plug into an outlet but nothing else. The silver tag says "extension cord" and the circular end of the plug](https://preview.redd.it/bri84736z7581.jpg?width=640&crop=smart&auto=webp&s=632f06030afdf7e2561a18a1dc79be68095a30ce)