Use 1 quart of Wipe Out per 100 gallons of water. Use 1 ounce of WipeOut per gallon of water for smaller hand held sprayers. Older poly tanks will take a stronger solution. Circulate the WipeOut treated solution throughout the system for 10 to 15 minutes. Purge hoses, spray lines, and nozzles for at least 1 minute with the cleaning solution. After cleaning, drain and flush entire system, including nozzles, with clean water.