Yes, you can pretreat your microfiber towels before washing in order to help remove stubborn stains and contaminants like dirt, grease, or polish. There are a number of different pretreatment methods that you can try, such as spraying the towels with a diluted detergent solution or soaking them in a bucket of warm water with some cleaning product added. However, it is important to always test any pretreatment method on an inconspicuous area of your towel before using it on other parts of the cloth. This will help ensure that the treatment won't cause any damage to the fabric. Additionally, always be sure to wash your microfiber towels separately from other types of clothes and fabrics, as they may contain substances that could harm their performance. We highly recommend pretreating your microfibers as soon as you finish your project. This prevents long-term build-up and will extend the life of your towels. You can let them sit in your pretreat bucket or basin for days and not have to stress about washing them immediately. You can also soak and prewash your polishing pads this way!