Try to remove it with hair dryer but don't set it in the hottest level, it might break the sensor. Just the right heat to remove the moist and don't put the dryer too close to the sensor, it also might break the camera...
Is your rear camera lens still have moisture inside? If there's still moisture inside the camera lens, you need to bring your device to an Authorized Samsung Service Center so our Samsung techs can remove the moisture from your camera lens. You can search for the nearest Samsung Service Center in your area through this link: https://www.samsung.com/ph/support/service-center/?msclkid=72d47e20cf8411ec8ac1394658c823b0
