Sometimes changing from "Static" to "Mempool" does not make the transaction fee lower as per our desire. I usually will keep this option as static but manually input the static value after seeing the transaction confirmation rates from mempool. Sometimes we are not in a hurry to get our transactions confirmed so we can put a bit lower values (get the idea from mempool) and this will further save the fee.


If you are still receiving the bitcoins in one wallet address (like all of us receive the signature payments in a single address), the best thing you can do is to consolidate the inputs after few weeks / months by sending all of your coins to another address of your wallet. Do this activity one you see very low mempool fee (https://mempool.space/). Usually in the weekends you will find comparatively low fees and that maybe the best time to consolidate your inputs.

It's good to check mempool.space, but that's not the best thing you can do.
The best thing you can do is to check the mempool by yourself and estimating the required fee rate by analyzing that. To do so, you can use jochen hoenicke's website.