hi there i was looking for a cheap way to reduce the humidity in a 4x4 6.5 box thank you

Put a dehumidifier in the same room and exchange the air in the cab many, many times over per hour (more airflow than you may have at present) is about the best you can do, IMO

ww

you can use a bowl of salt. put 1 or 2 bowls see if that helps do the trick. works for me

how often does the salt have to be changed?

you can also buy these crystals that absorb water in the air. they are typically used in boats and are also advertised for home use, especially with pets. when i had a problem with humidity i used "Dri-Z-Air". Simple place this out in a bowl, it collects water and lowers humidity. If it stops working, you can pour out the water, but the crystals on a baking sheet, and dry them out in the oven at a low temp to 'recharge' them for use again. best part: its less than $2 for a 13 ounce bag. made of calcium chloride. heres where i got mine: Dri-Z Air Refill Crystals - 13 Oz., Rainier Precision Model# DZA-13-4320, UPC: 013686115029

basically does the same thing as the salt.....but better :-)

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I second DieAbetic,it works pretty well and is much much cheaper than dehumidifier (although in that case you have also purification of air included) to use.

hay siriguejo. sorry so late to anser. change the salt every 2-3 weeks or when thare is moisture in the salt. hope this helps my friend.