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Crystal cat litter is made of silica gel. This material is extremely absorptive and will do an excellent job of pulling residual moisture out of a water-damaged phone. You can purchase crystal cat litter at any large grocery store or pet-supply shop. Do not use any other type of cat litter. Clay-based or powdery litters may stick to your phone and turn it into a wet, clay-covered mess. Instant oatmeal is more absorptive than regular rolled oats and more much absorptive than steel-cut oats. If you already have instant oatmeal in your home cabinet, it may be the most effective substance you can use to dry your phone. Be aware that if you use oatmeal to dry your phone components, you may end up with a phone covered in small, gooey bits of oatmeal dust. You can purchase unflavored instant oatmeal at your local grocery store. Synthetic desiccant packets are those 3⁄4 in (1.9 cm) packets that come in various commercial items including shoe boxes, dried foods (like beef jerky or spices), and electronic devices. The packets are typically filled with highly absorptive silica beads which will pull moisture out of your phone. You do not need to tear open the packets. Simply pile them up on top of your phone and let them pull the moisture out.  This option will only work if you’ve been saving up silica gel packets in advance for several months. However, this isn’t a bad idea: many people own smartphones, and the chances of dropping your smartphone in water at some point are high. Or, if you haven’t been saving up silica gel packets, you can order them in bulk through major online retailers. Couscous is a type of crushed and dried wheat grain. The small, dry grains will work similarly to silica beads or instant oatmeal and pull any residual moisture out of your phone components. You can purchase couscous pearls at any grocery store or supermarket. The pearls shouldn’t get any couscous dust on your phone’s components, making this a cleaner option than instant oats. Be sure to purchase an unflavored and unseasoned variety.
Try some crystal-based cat litter. Give instant oatmeal a try. Find some synthetic desiccant packets you could use. Use couscous pearls to dry your phone.