What happens next in this paragraph?

How to clean a hummingbird feeder
Pour out all the nectar.
As you likely stock your feeder with nectar, make sure to remove that before cleaning the feeder. You should simply pour the nectar down the drain.
Choose from:
a). Once birds have fed in the liquid it will contain mold and other contaminants so do not save unused sugar liquid from inside of the feeders. You can make more nectar later with simple sugar and water or restock the feeder with store-bought nectar.;
b). If you are using a mini feeder, dispose of the nectar at the end. If you are using a disposable feeder, throw the tray or a bottle away.;
c). However, you can also make sure the feeder is in a proper container for refilling it later. The exact process you need to complete will depend on the size of your feeder and you can find this information easily online.;
d). You need to pour out the nectar or else the bird feeders might become full of chemicals that can toxic or shock the bird. Only do this once you're sure that there are no contaminants in the feeders.;
a).