Liquify — Restore
Smoothen things out.
The Restore tool lets you undo the deformations locally by smoothing the Liquify grid.
The deformation grid is locally reset to zero (to the original state of the grid).
Adjust the size of the tool with the size slider Use small diameter for details, large diameter to bend overall geometry.
Be cautious while using this tool; the smoothing of the deformations is fast.