TL,DR: powder laundry detergent is better than the liquid one.
When it comes to choosing laundry detergent, I used to default to liquid detergent because powder would often clump together. However, I recently learned that liquid detergent has a bigger environmental impact - it contains microplastic particles that are hard to remove in wastewater treatment plants, and it's also less efficient at cleaning. Plus, liquid detergent usually comes in plastic bottles, whereas powder detergent is often packaged in plastic film or even cardboard.
So, I switched back to powder detergent. To avoid clumping issues in my humid laundry room, I found a simple solution: I use an old fork to break up the powder before use. It's a small effort, and I'm happy to be reducing my pollution footprint a bit. Video source (in German, maybe this weekend I'll look for better sources and add an infografic): https://youtu.be/HgIe4oxe2eI
I get powders for the washing machine as well as the dishwasher.
Shipping water around is dumb when the same product exists in concentrated form.
Doubly so when said machine is already designed to add its own water anyway.
Bonus point, the dishwasher acutely has some soap during the prewash, which can't the case when using a pod.
If it leaves soap residue, use less, mine needs about 1 table spoon, but the built-in compartment could probably hold 2-3 times that.
That probably depends on your water hardness.