To fix a slice, focus on correcting the outside-in club path by promoting an inside-out swing, while also ensuring the clubface is square or slightly closed relative to that path at impact.
Key Insights
A slice is often caused by an 'under-to-over' path where the club gets trapped and then thrown over the top, so changing the path to be more in-to-out is key to hitting a draw [src_1].
Prioritize fixing the clubface first, as a more square face will reduce slice severity even if the path is slightly off, and practice the 'Catch Rain' feel where the lead palm faces the sky post-impact to promote proper
To encourage an inside-out path, delay torso rotation in the downswing by keeping your back to the target for a split second longer, which helps shallow the club [src_2].