It is difficult to let an indoor potted plant completely drain while completely wetting the entire rootzone. I have this problem too. I want to completely wet the roots when I water, but I don't want to have the water drain out of the pot and onto my floor or countertop. What I have done in the past is have two trays at the ready. When the first tray fills with the leftover water, I perform the ol' switcheroo with the trays (replacing the filled tray with the dry tray, while emptying the filled tray). Another thing to remember is that in winter, Hoyas will need a little bit less water since they will grow less actively. I hope this information is helpful. Please let me know if you need any other horticultural advice as I am always happy to help a fellow gardener. Cheers...Robby