Your Ziplock bags are not for onetime use only. You must wash & reuse your Ziplock bags as many times as possible. These bags are very expensive. Recycle your ziplock bags. 

This is how I wash my used Ziplock bags.

1. Turn the bag completely inside out.
2. Use dish soap and scrubber (soft side).
   • Lay the bag flat on the kitchen sink and scrub it with plenty of detergents (pay more attention if the bag used to hold blood).
   • Rinse inside the bag briefly (“inside” will become “outside” later)
3. Dry the bag as is (the bag is still turned inside out).

Drying….