The ticks live on the snakes and not much of anywhere else.
The two methods mentioned by the OP aren't really that effective against ticks.
Snake ticks will not be found in your yard or anywhere else around your house unless you live in florida maybe.
Try using a dilute ivermectin spray on your cages, animals, and surrounding areas. You can get ivermectin from your vet or from a well stocked farm store like farm and fleet. This will not harm your snakes in diluted form. I believe you take one ml of a 1% solution into one quart of water. Spray once a week for a month and get rid of all the bedding and replace with newspaper until this month is over. This should kill all ticks and mites 100% and they should not come back. But you should check around the eyes and under the chin as sometimes they can hide there for quite a while.
If i got the dilution wrong someone correct me, but I am pretty sure that is right.
Good luck