Hey what type of machine are you using? Some machines respond worse to cold temps than others. My first thought would be EMI (electromagnetic interference) from your home. Other sources of interference are radar (military installations close by), microwaves, planes over head, or even low batteries in the machine. Also check all connections to see that some of them are not loose. A bad coil can also cause that problem. Between Del and I, we use Minelab and Whites. Each performs well at around freezing, but they start to get cranky when the closer you go towards zero :lol: A little more info would on your machines would help.