What do you guys use to make sure your old soil is safe to use again next year? As far as pests and diseases. Im on year 3 using rhe same soil.I just drenched it with anti bacterial soap and a strong neem tea.Had some strange white bugs that fly about the size of a small ant .And they look kinda Look a winged white ant.they get stuck in my buds and night makes a nightmare to getem out.basically i need to clean this old soil any thoughts?