iOttie Universal Dashboard and Windshield Mounting Base for Easy One Touch Series and Auto Sense Mounts

The adhesive on my iottie phone holder got too hot and will no longer stay attached to the dash. Do I need more adhesive, or just the dashboard pad?

Does it have a silicone bottom (like in the picture) or just a sticky surface?

what is the size

Will the iOttie pad work mounted on a residential window glass and hold an iPad computer?