Laura,
A pot that most closely matches the size and shape of the existing pot is the best one. Otherwise use a clay pot if it sits on a table or sill or a plastic pot if you intend to hang it.
The aroma, color, and stickiness of
flowers have all evolved over the eons to assist
plants in getting pollinated. That is their key to survival. However, if you are finding stickiness on leaf surfaces and underneath the
plant, then your Hoya may have a scale infesttaion. If so, let me know.
Brown edges on corn
plants can be caused by many things, including hard water, soil getting too dry, too much fertilizer, and roots coming out of the drainage holes. If there is a mass of roots at the bottom of the pot, cut them off, add an inch or so of fresh soil to the bottom of the pot, and put the
plant back in.
Keep your AV close to a north-facing window for best results.