There are stages in an artist's career when a gap is hard to fill with anything meaningful. The need to produce a work of art disappears for a while. Other things fill the gap and we leave the easel aside. Upon return the hand has lost its steadiness and the brain seems to be detached. Constant repetition is not the aim here, but there is a need to pick up the brushes at regular intervals to keep up the momentum. Like driving the car, there is something to be gained in regular use. The nerve can go. Keeping on practicing is the answer to the loss of skill.