If your feeder has yellow flowers on the feeding ports, remove them. Most will just slip off. The yellow is more of an attractor for the bees and yellow jackets. You will be bothered less.
I like the single tube feeders. These birds jealously guard feeders so I use single feeders and place them all around the house. That gives everyone a chance to dine. The single ones are also easier to clean and I change them daily anyway so keep a spare set to swap and wash them.