vitamix e310 tamper keeps getting stuck or hitting the blades, am i using it wrong?

DIAGNOSIS: You're either using the wrong tamper for your container, the lid isn't secured, or you're forcing it at the wrong angle.

FIX: Follow these steps to use the tamper safely.

1. First, verify you have the correct tamper. It must be the one supplied with your specific 48 oz. or 32 oz. container. Lids and tampers are not interchangeable.
2. Always operate with the main part of the lid securely locked in place. The splash disk on the tamper and the lid work together to prevent contact with the blades.
3. Only insert the tamper after removing the lid plug.
4. Don't hold it straight down if ingredients aren't circulating. Point it towards the sides or corners of the container. Do not force it deeper.

IF THAT DIDN'T WORK: Your container should not be more than two-thirds full when using the tamper. Also, do not use the tamper for more than 30 consecutive seconds to prevent overheating.