ISP proxies do not use session types. Those IPs never rotate.
What it does
Setting the duration
Under Advanced settings, Sticky has two options:
Custom accepts 60 to 86,400 seconds. That is 1 minute to 24 hours. Anything outside that range is rejected.
Enter seconds and the dashboard converts it. 500 becomes -ttl-8m20s in your username.
Getting a new IP
Change the session ID in your username. A new session ID means a new session, which means a new IP.-sid- value. Or generate a new proxy string in the dashboard, which does the same thing.
Running several at once
Set Proxies quantity above 1 in the Proxy generator. Each string gets its own session ID, so each holds a separate IP.