The filter is the lowest point of the machine. If you force it open, water will pour out.
Finally, after a deep breath, a better grip, and a sharp, decisive twist (with a dish towel for traction and a silent prayer), there is a sound. A crack. Not of breaking plastic, but of surrender. filter on washing machine stuck
Sometimes, the problem might not be with the filter itself but with the machine. Mechanical failures or issues with the filter housing can make it hard to remove the filter. The filter is the lowest point of the machine