Helping out a local school and a good customer...33,000 sqft Blue and green outdoor tennis courts (5 courts 2 are bad with clay runoff lots of mildew too) I have 10 GMP @ 3000 psi at 200 deg hot water. Tried just hot a house wash mix 1-4 water (Power House) - not much help (Black x jet) Tried Lemonene 33 g = 1.164040744 oz to 3 gal water Stepped it up to 77g = 2.6 oz to 3 gal water. I am not winning fast - hot water with green tip and also tried turbo nozzle (faster but will lift any loose paint - who can help. Sent from my iPad using Tapatalk