A sprayer that isn't properly cleaned after herbicide use can carry residue into the next job — a real risk if you switch products between a broadleaf-safe application and a full-strength non-selective treatment. Cleaning takes ten minutes and prevents damage to both your equipment and whatever you spray next.
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Why This Step Gets Skipped (and Why It Shouldn't)
Residue left in tanks, hoses, and nozzles doesn't just risk contaminating a future application — it can also corrode seals and clog nozzles over time, leading to uneven spray patterns that waste product and leave gaps in coverage on your next job.
Step-by-Step Cleaning Routine
Step 1: Empty Any Remaining Mixture
Spray out any leftover diluted mixture onto a labeled, already-treated area rather than pouring it down a drain or onto untreated ground.
Step 2: Triple Rinse the Tank
Fill the tank about 10-20% full with clean water, agitate, and spray it out through the nozzles. Repeat this three times — a single rinse leaves meaningfully more residue behind than most people assume.
Step 3: Clean Nozzles and Filters Separately
Remove nozzles and in-line filters and rinse them individually in clean water, checking for any blockage or residue buildup that a tank rinse alone won't clear.
Step 4: Run Clean Water Through the Full System
Run plain water through the hoses and nozzles one final time to flush the entire delivery path, not just the tank itself.
Step 5: Dry and Store Properly
Store the sprayer empty, with the tank cap off, in a dry location away from direct sunlight and freezing temperatures, both of which can degrade seals and hoses over time.
Cleaning Checklist by Situation
Situation Cleaning Level Needed
Switching between similar herbicide products Standard triple rinse
Switching from herbicide to a product for edible crops Triple rinse plus dedicated tank cleaner if label recommends it
Long-term storage (off-season) Full clean, complete dry-out, cap removed
Pro tip: Keep a sprayer dedicated to herbicide use only, separate from any sprayer used for water-soluble fertilizers or products applied to edible crops. Even a well-cleaned tank can retain trace residue, and a dedicated sprayer removes that risk entirely rather than relying on cleaning alone.
Watch out: Never rinse a sprayer near a well, drain, or waterway. Even diluted residue can pose a contamination risk — rinse onto an already-treated area or according to your local disposal guidance.
Frequently Asked Questions
How many times should I rinse a sprayer tank after herbicide use?
A triple rinse is the standard recommendation — a single rinse leaves meaningfully more residue behind than most people expect.
Can I use the same sprayer for herbicide and fertilizer?
It's generally safer to use a dedicated sprayer for herbicide only, since even careful cleaning can leave trace residue that could affect sensitive plants when applying fertilizer or other products afterward.
Where should I store a sprayer between uses?
Store it empty, with the cap off, in a dry location away from direct sunlight and freezing temperatures, both of which can degrade seals and hoses over time.
Explore our full herbicide range, all shipped with clear label instructions for safe use and cleanup.
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