No heating either, I used plain baby oil and unscented anti-allergic hand cream for cleaning the wrist rests of my old Aspire a515-54G that was cluttered with stickers, the thick metallic stickers leave the worst glue, there will be some shading marks left if you remove the stickers late (years) but if you do it immediately it will come out perfectly. Even the shading will disappear after some time. Tip, don't overdo the rubbing as that will generate heat and will make the mess worse, just use your fingers lightly, never fingernails, and nothing abrasive or hairy, only very soft fiber cloths used for cleaning your reading glasses, and a lot of patience, do the cleaning piece meal over a few days. 😉