How to Open a Hot Tub Spa. First of all, please realize that most damage that occurs to hot tub spas is caused by improper winterization or when the spa is not used for long periods of time. When it comes time to open up your spa, this is when these problems will become evident. While it is strongly recommended to have a pool or spa professional close your spa for the winter, many homeowners do successfully tackle the job of spa opening themselves. It is much less risky!