Dogpack, I hear people say many times they do not want to bring bugs in if they put their plants out for the summer. I have been taking my plants out for 30 years and have never and I do mean never had any mealy bugs, aphids or any other pest in the winter. I outdoor summer 100s of plants because of age I am going to cut back on the houseplants this year but that is another story.
Healthy plants you have a better chance of not having bugs in the house in the winter. By giving them a summer vacation outside is the best health you can give your plants, because our houseplants are really tropical plants if they go outside they get the tropical climate and when we bring them inside they get the rest that they would get in the tropics.
Here is a good site to read that might help you Cliva yellow leaves. You can check and see if any of these are the problem i.e. over watering, root rot, pot bound etc.
http://www.ehow.com/info_86498...
Only other things I can add are.......
Your Cliva may be getting too much light. I have had problems with plants that were growing fine until Spring and I notice leaf burn. It was because although it was too cold to take them out yet the sun direction and strength of the Spring sun is stronger than it was in the winter. So if you have shade plants you might still need to move them to another position inside even if you are not going to take them outside.
The other issue could be too much water. When the leaves on my Brugmansia start to yellow and I know the light is right water is right. I mix 1 tablespoon of epsom salt in a gallon of water and give it a drink. With in a week the leaves green up.