The time it takes to melt wax in a crockpot will vary depending on several factors such as the amount of wax being melted and the specific temperature setting used on the crockpot. Generally, it can take anywhere from 1-3 hours to melt wax in a crockpot set on low heat. It's important to periodically check on the progress of melting wax and stir occasionally to ensure even heat distribution and prevent scorching. Remember that patience is key during this process, as rushing or increasing the temperature too high can lead to inconsistent melting or even jeopardize safety if the crockpot becomes too hot for handling.