Before you reach for that silica spin column, stop to consider some ways to purify DNA without a kit. DNA purification kits have advantages: they are convenient and provide uniform, consistent results. But they are also less accessible due to their expense and requirement for lab equipment. Plus they create plastic waste. Kits can also have the annoying tendency to runout right when you need them and to accumulate a bunch of unused buffers because you’ve run out of columns.