How to Use a Lid Opener for Stubborn Vacuum Jars

By Herzlich Willkommen bei Westmark | Published: 2026-10-13

Category: How-to Guides

Learn how to use a lid opener to break the vacuum seal on stubborn jars. Step-by-step guide with tips for the Westmark Vacumex and everyday kitchen jars.

Quick answer

To open a stubborn vacuum-sealed jar, place the lid opener under the lid rim and lift gently to break the vacuum. Once you hear the pop, twist the lid off by hand. The Westmark Lid Opener »Vacumex« is designed for this exact job, letting you tackle tight lids with minimal effort.

Why vacuum-sealed lids get stuck

When a jar is vacuum-sealed, the pressure inside is lower than outside. That pressure difference pushes the lid down tightly against the rim, making it hard to twist. Trying to force it by hand can hurt your wrist or damage the lid. A lid opener works by slipping under the lid edge and letting air in, which equalizes the pressure so the lid turns freely.

Choosing the right lid opener

Not all lid openers are the same. Some are simple lever tools that pry under the rim, while others combine a lever with a twist mechanism. For vacuum-sealed jars, a compact lever-style opener like the Westmark Lid Opener »Vacumex« is often enough. It is small enough to keep in a drawer and built for everyday use. If you also struggle with cans, a separate automatic can opener like the Westmark Can opener »Automatico« can save time, but it is not designed for jars.

Safety and care tips

Always work on a stable surface. If the jar is glass, avoid tapping the lid with metal tools, which can chip the rim. After use, wipe the lid opener with a damp cloth and dry it to prevent rust. Most lid openers are not dishwasher-safe unless stated; check the manufacturer's instructions. The Vacumex is compact and easy to store, but keeping it dry will extend its life.

Step-by-step: how to use a lid opener on a stubborn jar

Position the opener under the lid rim: Hold the jar steady with one hand. With the other hand, slide the tip of the lid opener between the lid and the glass rim. You only need a small gap. Checkpoint: the opener should sit flat against the lid edge, not at an angle.
Lift gently to break the vacuum: Apply slow, steady upward pressure on the handle. You should hear a soft pop as air enters the jar. Do not jerk or twist the opener. Common mistake: forcing the opener too far under the lid can bend the lid or spill the contents.
Twist the lid off by hand: Once the vacuum is broken, the lid should turn easily. If it still resists, repeat the lift in a different spot around the rim. Checkpoint: if the lid still won't budge, the jar may be damaged or cross-threaded; do not use excessive force.
Clean and store the opener: Wipe the opener with a damp cloth and dry it thoroughly. Store it in a drawer where it won't get bent. Next step: keep it near your other everyday kitchen tools so it's ready when you need it.

Product facts

Lid opener »Vacumex«: The Westmark Lid Opener »Vacumex« is a practical accessory designed to make opening jars and lids easier. It gives you a dedicated tool for stubborn vacuum-sealed lids instead of relying on knives or hot water.
Lid opener »Vacumex«: Designed for effortless opening of vacuum-sealed lids. You can break the seal with less hand strength, which is helpful for everyday kitchen tasks.
Lid opener »Vacumex«: Compact and easy to store in your kitchen drawer. It stays within reach without taking up much space.