I understand those having a rough time with the dry weather, so I have a few solutions for you. 1st explain to your customers as they depend on you, you depend on them. I tell them I understand there may be times when the grass isn't growing, however we still need to get paid, they are expecting to spend the money anyway. Let them know you cannot control the weather, however when the season is good or in the spring they expect you to be there weekly or whatever your arrangement is if we do get a few weeks where the turf isn't growing as rapidly, advise them you will still come by edge sidewalks, driveway, pick up any trash etc. and bill them for their regular cycle. If they object then kindly tell them if we are going to provide a dependable service then we need to know our revenues that are expected to come in, them let them know that by you providing a service to them and they expect you to skip during period of dryness, that you have the right to drop them if a lawn comes along that is irrigated that will need weekly service. Usually they understand. Let them know this is how you, your employee's support yourselves. We have great success with this and would you believe it, our customers take us seriously. Men, women, we are not a matter of convenience for our customer we are in demand just like, heating/Air, mechanics, etc. Sure you can use this time to sell more work, but you still need to know your revenues. Also charge a monthly amount and those that select to pay it mow there 1st cutting with a discount and there last with a discount. hope this helps, and you don't have to wait until next season to implement this.