How do I keep fries crispy

Any time I've made fries, they come out perfectly from the oil. But they soften quite a lot by the time I can get them to the table, even though i save frying to the last step and pretty much cook and serve right onto the plate. Then 5 minutes into the meal, they go limp and can't even stand up straight anymore.

Even ordering take out, where the fries have sat under a hot lamp for 20 minutes before being served into a bag to steam and take 30 minutes to get to my door are crisper than the homemade ones.