Good props are buy-once purchases if you give them ten minutes of care a month. Material by material, here is the routine.
Cork blocks and wheels
Wipe with a barely damp cloth and let them dry away from radiators. Cork hates soaking and loves a light sanding once a year to refresh the face.
Cotton straps and blankets
Machine wash cold in a laundry bag, line dry. Re-thread the strap buckle before the first use after washing — webbing relaxes slightly when clean.
Wool layers
Air them more, wash them less. A monthly afternoon over a chair in fresh air keeps wool sweet; wash gentle and flat-dry only when truly needed.
Linen covers and fills
Covers wash cold and iron warm if you like them crisp. Tip buckwheat fills into a tray once a season to air, and top up the loft with a refill bag.
