I just wanted to remind you to dust your houseplants every now and again. I try to do mine every few weeks.
You can dust them by either gently wiping the foliage with a soft cloth or you can mist the plants with water from a spray bottle.
Using the spray bottle method has an added benefit of putting some humidity into the air. Since many of our common houseplants are exotic they appreciate the extra humidity. I always notice that after a good misting my plants look greener and healthier. This is also a good time to cleanse and recharge any stones you have added to the plant. In my case I place moss agates in the pot to encourage growth and health.