Liquid lawn dethatchers can be an effective way of removing thatch buildup from lawns. They are easy to use, don’t require any large equipment, and their fast-acting nature makes them ideal for quickly ridding lawns of thatch without needing to wait for the process to take effect. The downside is that liquid lawn dethatchers may not penetrate as deeply as mechanical or tow-behind models and are not suitable for tougher thatch buildup.