After cleaning my landscape brushes thoroughly with odorless cleaner or Baby Oil, I will dip each brush into baby oil and gently (that’s GENTLY) slide the brush through my forefinger and thumb to remove excess oil. Then I store them in a flat container until the next time I’m ready to use em. I store my brushes like this if I believe it will be three days or more before I use them again. If I believe it may be 2 weeks or longer before I paint again, I’ll wrap the brushes up gently with saran wrap or a similar sap to keep the shape of the brush intact. The brush hairs will stay soft as well.