I would check first if the hose actually has a hole in it or is just clogged.

And to answer your question... I don't think so?
Should be able to get at a majority of the hose if you remove the A pillar cover.

 

Blow them out from the bottom up if you can.

 

Exactly what they both said. Most likely they are clogged a bit. If you use air to blow them out use low pressure and not high. I bought a 6 dollar dryer vent wire cleaner, cut the brush off the end and slowly cleaned them out. Not on our cars but on a cadillac CTS. They are famous for leaking.
If your hoses are partial or blocked completely, water will run down the outside of the hose giving the appearance of a leak.