[Florida]

I am looking for a cheap supply of surfactants for use as a soil wetting agent. Here is why; the soil in my garden is hydrophobic. When I water the garden, most of the water pools on the surface and drains out of the garden. I can water for an hour and the soil is still dusty dry.  Here in Florida this is a common problem.  For some reason the soil particles are covered with a waxy substance caused by the decomposition of organic material.   Commercial wetting agents are available but they are definitely not priced for the average consumer.  2 gallons cost about 70 dollars. I was thinking about laundry detergents but the main ingredient Sodium Carbonate might be a problem since it will change the Ph of the soil and cause problems for the plants. Does anyone have any ideas of a cheap source of surfactants?  Thanks for the help
Here are the MSDS ingredients for Tide laundry detergents.



Sodium
carbonate
Linear alkyl
benzene
sulfonate
Subtilisin Protealytic
Enzyme