There are many LOCA (Liquid Optically Clear Adhesive) products on the market that are used to bond touch screens. Manufacturers use additives in LOCAs to accomplish desired performance (such as preventing discoloration and providing for proper UV curing). UV at 365nm (just below the visible spectrum) is typical for curing most LOCAs. Heat may soften the adhesive and if the LOCA layer is too thick then it could require additional curing. I don’t know if the Tesla screen problem is due to using LOCA without proper additives, using LOCA that is beyond its shelf-life, applying too thick of a coat, or something else. UV will eventually cure the LOCA, but heat may bring the yellow (or orange-brown) back until its fully cured. Curing works best with cool temperatures - the higher watt UV bulbs will cure at a faster rate. This curing process may take multiple iterations to completely cure depending on type and thickness of the LOCA. I did not want to speculate or guess about this so I did my own research to understand the science behind the problem and the proposed solutions.