Sponge!!

A useful tool for applying ink to paper, edges and even stamps, the Stampin' Up! ink applicator sponges (101610) come in packs of three for £3.25. But you can cut them into wedges and make 24 applicators. You'll want to have a sponge for each ink pad colour to avoid contaminating ink colours. Trust me,  a blue sponge dabbed onto a yellow ink pad will give you nothing but a green stain and a seething hatred for the world!