After wiping the rubber plant's leaves with beer, they turned glossy green and it grew like crazy up to the ceiling

The rubber plant is a rather impressive potted foliage plant, so what exactly is causing its slow growth?
The rubber plant likes a warm, humid environment, loose and breathable soil, and a spot with plenty of diffused light. I wonder whether the questioner has managed all of these?
First, make sure the soil is loose and breathable. Only when the soil is loose and breathable can the roots grow well, spread out more freely and reach deep; only when the roots grow well will the rubber plant thrive.
In fact, watering must be sufficient, because it is a plant from the south and likes a warm, humid environment. So keep the potting soil slightly moist, and once the surface of the potting soil is dry, water thoroughly right away. Since the soil is loose and breathable, even if you water a lot, it will not easily become waterlogged and rot the roots, because the excess water has already drained away. Prolonged lack of water will make the rubber plant grow slowly and suffer from poor nutrition.
Fertilizing: because the rubber plant grows rather fast, you must never skimp on regular fertilizing. It is a foliage plant, so fertilizing should focus on organic fertilizer mainly based on nitrogen. Nitrogen fertilizer can promote the growth of branches and leaves and make the leaves thick and glossy. During the growing season, fertilizing once or twice a month is enough. Be sure to apply light fertilizer frequently. Without enough fertilizer and water, the rubber plant grows slowly.
Light: the rubber plant is fairly shade-tolerant, but it also very much likes light, preferring natural diffused light. So when we grow a rubber plant at home, we must place it in an environment with plenty of diffused light.
The rubber plant's leaves are rather large and thick, and have a certain ability to absorb dust, which means we need to spray the leaves with water often. First, to keep them moist and increase air humidity; second, to wash off the dust on them, which helps the leaves breathe. You can also use fermented beer diluted with water at a 1:50 ratio to wipe the leaves. This not only makes the leaves glossy but also acts as a foliar feed. As long as you pay attention to these points, the rubber plant will grow very fast and reach the ceiling, which is truly spectacular.