How to Clean Stasher Bags: Seals, Odors and Drying

Step-by-step instructions

Step 1: Empty the bag and inspect the closure

Remove remaining food and shake crumbs into the trash before washing. Open the bag normally and look along both halves of the pinch seal, the lower corners, and any folds around a stand-up base. Do not stretch the mouth farther than necessary to see inside. A lodged seed or dried sauce can interfere with closure even when the rest of the bag looks spotless. Check for tears, split seams, or a damaged closure; cleaning cannot repair a structural leak, and sharp tools can turn a small problem into one.

Step 2: Choose hand washing or the dishwasher

Stasher permits its bags on either dishwasher rack. Position the opening so wash water can reach inside and drain away, without forcing it over a sharp rack point. Keep it clear of objects that could pierce the silicone. For hand washing, add warm water and a little dishwashing liquid, then work a soft sponge or brush around the interior. Wash the outside too, particularly if it contacted raw-food packaging or a dirty lunch counter. Do not assume a quick exterior rinse cleans food residue inside.

Step 3: Work gently along the seal

Use the soft brush to follow the sealing grooves and dislodge food without cutting or scraping the silicone. Partially open the mouth as you work rather than flipping the whole bag inside out. Stasher warns that inversion can strain the seams, so it is not a necessary shortcut for reaching corners. If something is stuck, wet it with warm soapy water and repeat the gentle brushing. Pay attention to the two ends of the closure, where your fingers often stop short during a fast wash.

Step 4: Rinse and reassess before treating odors

Rinse away detergent and loosened food, checking the seal again under good light. A clean bag should not have a greasy film or particles trapped in the closure. If it still smells of the previous meal, Stasher's care page suggests equal parts warm water and white vinegar as an odor reset. Keep this separate from the ordinary soap wash, then rinse again. Do not mix vinegar with bleach or other cleaning products. An odor treatment is not a substitute for first removing the food that caused the smell.

Step 5: Use an optional reset only when needed

For stubborn odors, Stasher's current care instructions offer heating the clean bag in an oven at 350°F for 10–15 minutes. This is an optional method for the plain, oven-compatible silicone bag itself; do not include unrelated clips, accessories, or another brand's bag. Use a clean oven-safe tray, handle it as hot cookware, and let it cool before touching or closing it. For food-color stains, the brand also suggests a few hours of sunlight. Neither method is required after every use or guarantees a like-new appearance.

Step 6: Dry with the opening supported

Drain the bag, then leave it open on a rack or over a clean bottle so air can circulate inside. Check the lowest corner and sealing channel before putting it away; the outside may feel dry while drops remain inside. Do not seal a damp bag and assume it will finish drying in the drawer. A towel can remove accessible water, but pushing a sharp utensil wrapped in cloth into a corner risks damage. Allow extra drying space when several bags are washed together rather than nesting them wet.

Step 7: Store gently and check before reuse

Put away only completely dry bags and avoid crushing their closures under heavy kitchen tools. Before packing liquids, confirm the sealing channels are clean and press the closure fully along its length. If leakage continues after a careful clean and correct closure, inspect the seam instead of repeatedly applying heat or stronger cleaners. Match any replacement decision to visible damage and actual sealing performance, not simply discoloration. A reusable bag can retain a food stain without that alone showing that the silicone or seal has failed.