Zerostat only neutralizes charges during use. Problem is a spinning record is a charge generator that certain materials only makes worse. Like noise and hum problems there's seldom a silver bullet its more about shot-gunning to get as many as possible.
Different mat might help, but then you have the problem of it might not sound as good in other ways. There's devices that run along the record like a dust brush only they conduct charges off the record. Sometimes also helps to ground the spindle or chassis, depending on the table. Humidifier you already know about. Static Guard anti-static laundry spray is sold in many stores, I use it all the time. Waft around the turntable and over cables as well. I notice improvement and its not like I have any obvious static problem. There's other more long lasting sprays you can find. Haven't tried them myself but search around you never know.
Different mat might help, but then you have the problem of it might not sound as good in other ways. There's devices that run along the record like a dust brush only they conduct charges off the record. Sometimes also helps to ground the spindle or chassis, depending on the table. Humidifier you already know about. Static Guard anti-static laundry spray is sold in many stores, I use it all the time. Waft around the turntable and over cables as well. I notice improvement and its not like I have any obvious static problem. There's other more long lasting sprays you can find. Haven't tried them myself but search around you never know.