Got you to look, didn't I! Here's my DH heading out to the greenhouse with the sprayer full of soapy bleach water to disinfect the place in preparation for taking the plants out there. We do this every spring to destroy any potential aphids & diseases that can attack young plants. Next we'll staple up more plastic inside for a vapor barrier, then re-install the oil heater.
I don't keep soil in the greenhouse, potting everything instead. This also helps to keep the plants from contracting any bad microbes or aphids.