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Using a spray bottle lets you target specific parts of your shoe. This is super helpful if your boots aren't all leather and you've only got a few spots to hit. If you don't have a spray bottle, you can use a sponge or an old rag to dampen your boots. Don't be afraid to get them nice and soggy, because any dry parts simply won't shrink. Spray from about 5 inches (13cm) away to avoid making a big mess. Holding your dryer about 6 inches (15cm) in from the boots, slowly and evenly pass over each one until they're both bone dry. The key here is to be gentle holding the dryer too close (or running it too hot) can absolutely wreck your boots. The parts you dry first will shrink the most, so start with the parts of the shoe that are loosest on your feet. If either boot is still too lose, spray and dry the boots again in the same way. Repeat until the boots fit properly. The conditioner will keep your leather from cracking or peeling following the heat from the blow dryer. Feel free to use lots of the conditioner to make your boots really shine.
Fill up a spray bottle with hot water. Spray the leather outer surfaces of your boots. Blow dry the outside of the boots with a hair dryer on low speed. Try on the boots to see how they fit. Rub leather conditioner into the boots.