Rain Sensor Silicone on the Windshield

My windshield changed 3 years ago, and after that the wipers worked irregularly, I didn't care until now, but now it started to sink into my eye, when I researched it a little, I read that it might be due to the sensor sensor silicon not sitting on the windshield, there are air bubbles, does this silicone change, or It was removed and reinstalled, I talked to the service, he said that I can make it in glass shops, but how true, does anyone have an idea, thank you.