how long does it normally take until i have to replace my O-ring by YoYoJam yoyos?
playing maybe 1 hour a day or so

Somewhere between five and ten years would be a good rough estimate.

If not longer…

Keep in mind that if you’re having trouble with an O-Ring response, you can clean the O-Ring with a light soap and water mixture, or completely flip it over for a fresh side. Not to mention the O-Ring that fits in them are like 0.15 cents in the US. :stuck_out_tongue:

Though, most use flowable silicone.

silicone o-rings perhaps.