It is best to clean the lace immediately after wearing. Pour 90% isopropyl alcohol into a bowl and very briefly soak the lace edge in the alcohol to loosen the glue. Once the glue has loosened, remove the lace from the alcohol, lay it on a old towel, and use a soft towel to very gently rub the spirit gum off of the lace. If this doesn’t remove all of the glue, return the lace to the alcohol and repeat. It is better to soak and re-try than to try and scrub the lace to remove spirit gum, as the lace is delicate and can tear through rough scrubbing. The sooner you clean glue off of your facial hair after wearing, the easier it will be to clean. Easier cleaning means less wear and tear on your pieces!
For more information, check out this guide to cleaning and caring for any lace front piece
To remove spirit gum that may have gotten into the hair, a gentle paste of water and baking soda can be used to loosen up the glue, allowing it to be shampooed out with a mild shampoo. Frequent, careful cleaning after each wearing is the key to maintaining your pieces in the best possible condition.