Barkeepers Friend may work. Or, a soak in hot water with ammonia in it. Either way, it will take some elbow grease. You may want to cook at lower temperatures.
Wash as normal and then pour baking soda on the areas needed. Scrub in to make a paste. Leave for a few hours and wash off. Wash as normal before use. Repeat if necessary.
The best way to remove a sticky residue from plastic is to use a gentle emulsifier. A gentile antibacterial soap and a soft bristle brush can normally get rid of a sticky residue.
Use nail polish remover and a rag to scrub it off.
Reminder tabs that you can stick anywhere and later just pull off and not leave sticky residue.
Pull the paper completely off, then remove the residue with Lift-Off or Goo-Gone
To remove sticky residue from a book cover, try using rubbing alcohol or an adhesive remover. Apply a small amount to a cloth or cotton swab and gently rub the residue until it lifts off. Be cautious not to damage the book cover or pages while cleaning.
WD-40 works well removing the sticky residue.
I always use Goof Off and it takes every bit of residue off very cleanly.
gently rub baby oil or WD40 on it.....
I would heat the griddle back up and wipe it off while it is warm.
Put it in warm water for a few minutes the get one end and pull it slowly. Get residue off with Goo Gone.
Buy a product called "Goo-Gone"- it should remove label residue and has a lemon scent
Hair spray should work, you can also buy goo gone, or a citrus cleaner.