The "Secret Sauce" in Optical Foliar Switch is ethylene, it's a gas produced by ripening fruit. You may be able to acheive the same thing by placing ripening apples or pears underneath your plant for several days or a week. Might have to tent the plant to get optimum results. Still, if you're consistently getting hermies, you've got other issues, either in growing or the seeds themselves. I have used ripening fruit to "encourage" a bromeliad to flower, but in most plants it does the opposite. Here are some effects of Ethylene:
The effect of ethylene gas upon fruit is a resulting change in texture (softening), color, and other processes. Thought of as an aging hormone, ethylene gas not only influences the ripening of fruit but may also cause plants to die, generally occurring when the plant is damaged in some manner. Other effects of ethylene gas are loss of chlorophyll, abortion of plant foliage and stems, shortening of stems, and bending of the stems (epinasty). Ethylene gas can be either a good guy when used to hasten ripening of fruit or a bad guy when it yellows vegetables, damages buds, or causes abscission in ornamental specimens. Further Information on Ethylene Gas. As a plant messenger that signals the plant’s next move, ethylene gas can be used to trick the plant into ripening its fruits and vegetables earlier. In commercial environments, farmers use liquid products that are introduced pre-harvest. The consumer may do this at home by simply placing the fruit or vegetable in question inside a paper bag, like a tomato. This will concentrate the ethylene gas inside the bag, allowing the fruit to ripen more quickly. Do not use a plastic bag, which will trap moisture and may backfire on you, causing the fruit to rot.