Using a liner with Litter Maid products is typically not recommended, as these self-cleaning litter boxes are designed to function optimally without one. The systems work best when the litter is placed directly into the litter box without any additional layers, as this allows for efficient operation and cleanup. If a liner is used, it may interfere with the automatic raking mechanism, possibly leading to issues with the cleaning cycle and overall performance. It is important to choose a suitable clumping litter that works well with the unit to ensure proper waste management and to prevent any clumps from sticking to the box itself. For the most accurate guidance, it can be helpful to refer to the product instructions or the resources available on the official Litter Maid website for more information about the recommended practices for the specific model you own.