Hi Wendy,
yes it can be done, but it is a slow process. Put all the soap in a bowl, the sort of bowl you would choose to make mashed pototoes in. Add boiling water ( you will need to experiment with the quanity. I would start with adding 25% water to 100% soft soap. Mash it through with a potato masher. Cover the bowl with a towel and check it in the morning to see if it is the right consistency. If you need to make it thinner by adding more boiled water, the next time will be faster. Eventually you will know which proportions to use to get the best result from your dispenser.