Vacuum the cushions to remove loose dust and debris.

Test a small area with a cleaner to ensure it doesn't damage the fabric.

Mix mild dish detergent with cool water to create a soapy solution.

Dip a sponge in the solution and gently sponge-clean the cushion in long strokes.

Rinse the sponge and repeat the process with clean water to remove any remaining detergent.

Allow the cushion to dry completely, using a fan to speed up the process if needed.