Yes, you can wash fabric glue after it has been applied to fabric. However, it is important to consider the type of glue used, as some fabric glues are more permanent than others. Permanent water-resistance fabric glues can be washed without damaging the fabric, but it is important to follow the directions on the glue packaging to ensure that the glue is not weakened by the washing process. In general, these types of glues can be washed on a gentle cycle with cold water and a mild detergent. It is also important to use a low heat setting when drying the fabric to avoid damaging the glue. Additionally, it is best to avoid dry-cleaning the fabric, as this may cause the glue to break down.