Every time my grape ivy is in the house, its leaves turn brown and die off. It makes me so mad, because it has light and I water it. I have even let it get dry. Something in my way of caring for this plant isn't right.
Warm temperatures can effect the plant.
Also you may want to try using distilled water to water the plant.
You can also let the water sit on the counter for 48 hours before using.
This article will give you more help in creating the right growing conditions.