Too much sun or a feeding gap

What's happening

New leaves bleaching to a pale, washed-out yellow on the window side points to too much direct sun scorching the tender growth. Pale, weak new leaves with no recent feeding instead point to a nutrient shortfall, since young growth is the first place a lack of food shows up.

How to fix it

Move the plant out of any harsh direct sun into the bright, indirect light a rubber plant prefers. If feeding is overdue, start a balanced liquid fertilizer at half strength through the growing season. Leaves that emerge after the change should come in a healthy, glossy green.

This is general guidance based on common symptoms; individual plants vary.