“Dry-looking” can mean different things: roughness, dullness, tangling or a finish that feels harder to manage than you would like. A leave-in conditioner can be a useful step, but only when its texture and amount suit your hair.
Choose by texture
Sprays are often a straightforward choice for lighter application. Creams and lotions may suit people who want a richer feel or more targeted use on the lengths. The right product should make your routine easier, not make hair feel coated or weighed down.
Apply with restraint
Start with the quantity stated on the label, concentrating on lengths and ends unless the product specifically says otherwise. It is easier to add a little more than to undo an overly heavy application. Comb or brush through gently if that suits your routine.
Build a simple routine
Use a leave-in conditioner as one useful tool, not a cure-all. Pair it with gentle detangling, appropriate washing and sensible heat-tool use. If you regularly blow-dry, see Best Heat Protectants and How to Choose a Hair Dryer.
The bottom line
Choose a leave-in conditioner by feel and routine. A lighter product used consistently is often more useful than a richer formula you avoid because it feels too heavy.