To give your knitwear a long and healthy life, there's no need to wash it regularly. Instead, try airing it out to ventilate. When washing, follow these steps:
Wash by hand in cool water, separately from other items. You can do this by running a bath or using a sink. Add a bit of natural wool detergent (if you have some). Place in the water and soak for around 10 minutes.
Gently squeeze out any excess water, avoiding wringing. When drying, be careful not to stretch your knitwear. Dry flat on a towel instead of hanging.
Always store your knits folded, not hung. The weight can stretch the garment out of shape. If possible fold away in drawers to protect against pesky moths.
Our knitwear is made to last, but pilling can occur naturally with friction. A pilling comb or fabric shaver will easily remove it. If a hole does appear, patching or darning are great ways to cover it.