In 1906, Dr. G. P. Abrahams purchased the property from McWilliams and continued operating the health spa and bottling plant until his 1924 death. In 1924, the property passed to Dr. Carl Bingesser, who had married Abrahams' daughter Anna in 1907. Under both Abrahams and Bingesser, the hotel resort was improved upon and maintained a solid reputation as health spa and place of healing. It continued to do so even as the spa passed on to Dr. Carlos Bingesser, the third generation of the Abrahams-Bingesser family to own and operate the spa. The facilities were fully modernized and offered physical therapy, hydro-therapy, electro-therapy, and dietary regimens. Water from Waconda Spring was used for internal and external cleansing of the body. It was piped into every bathtub in the sanitarium, was served with meals, and used for enemas. A popular slogan used to lure tourists to the resort was, "It will clean works until your works work." Waconda Spring was a popular, profitable enterprise for the Bingesser family.