i always used a product called spray nine,and garden hose,make shure you cover all holes that water aint supposed to be in, spray it one let it sit for 30 mins and hose down,redo if needed,can be dryed off with a air hose or sometiime i use a leaf blower, no easy way just take your time and keep your eyes open you may see cleaner trail like dips marks where is been leaking