Hexcrawls in 5e - Encounter Difficulty problems

As the title suggests. I've tried a small minihexcrawl in 5e, and the party's chewing through their CR encounters like a hot knife through butter. What'd you suggest is the way to tire them out a bit more, except of course, raise the difficulty of the encounters?



How do you handle hexcrawling in 5e, seeing how the heroes have much more resources (due to short rests) than in 3e>= editions?

Hexcrawls in 5e - Encounter Difficulty problems