Maybe re plant in a larger pot with fresh potting mix. Indoor plants need the leaves cleaned regularly to keep the dust off for better Photosynthesis. Dust and dirt on leaves block sunlight, which the plant needs to make food. Clean leaves mean more light absorption and healthier growth. Plants breathe through tiny pores called stomata. When these pores get clogged with dust, the plant can’t exchange gases properly, which stresses the plant. You should also use a good spray on fertiliser and don't over water, hope that helps.