The next attempt should not merely be louder.

Repeating an approach with more volume, more hours, or more insistence is the most common response to failure and one of the least effective. Intensity multiplies whatever the method already does, including its errors. If the approach was wrong, doing more of it makes the outcome arrive faster.

Before adding effort, check whether the method has changed. If it has not, that is where to work first. Save the intensity for a plan that deserves it.