You have had a mirro pressure cooker for years with no problem Now it will not build up leaks around the edges you thought was seal but purchased new one and does same?

Here are a few things you can check to troubleshoot the problem with your Mirro pressure cooker:

1. Check the Lid Gasket:

- Make sure the lid gasket is properly seated in its groove. If the gasket is damaged or worn out, it can cause leaks.

- Clean the gasket thoroughly to remove any food particles or residue that might be interfering with its seal.

- If the gasket is damaged or worn, replace it with a new one that fits your cooker model.

2. Check the Lid Lock:

- Ensure the lid lock is securely closed and engaged properly. If the lid is not closed tightly, it can result in leaks.

3. Check the Pressure Release Valve:

- Make sure the pressure release valve is clean and free of any obstructions. A clogged pressure release valve can prevent the cooker from building up pressure and may cause leaks.

- Ensure the pressure release valve is properly closed when cooking.

4. Inspect the Pot and Lid for Warping:

- Over time, the pot or lid of your pressure cooker may warp due to heat or mishandling. If this happens, it can cause the lid to not fit snugly, resulting in leaks.

5. Follow the Manufacturer's Instructions:

- Refer to the user manual of your Mirro pressure cooker to ensure you're using it correctly. Make sure you're following the recommended cooking times and filling guidelines.

If you've checked all of these aspects and the pressure cooker still leaks, it may be time to contact Mirro customer service for further assistance.