I think if your talking to the customer the way that it comes across here than you sound kinda arrogant. No offense but I would try to take a look at how your sending that message to them. We always face price objections/negotiations with an attitude of we can either do it or we can't. A lot of times it just depends on the timing and how bad we need/don't need the job.
i have a good relationship with my customers. every now and then it comes up, especially with my apartments. they start trying to con me into lowering my price with the threat of price shopping. they know i do good work for a good price already but they get shopped a lot. ive had 3 complexes come back to me and a couple others have made comments about it. even some residential have tried to get a better deal but my prices are already low imo. especially for the quality i provide, i know it and my customers know it.
when i reply im not an ass about it. im usually smiling if not chuckling already. its happened enough i know the routine. i just let them know how i feel about it and like i said it usually ends up they never mention it again. one complex i raised the price 10% when they called me back and they didnt complain. now im locked in and i have a better relationship with the owner. we had a long talk about it.
maybe its a good time to build a more solid relationship with that customer.
with restaurants its a repeat job so they get a better rate i tell them. if i have to skip a few cleanings and or fix someone elses poor work my cost goes up so i have to charge more to make up the difference. its an easy sale imo. most people dont like change and if they understand the possible consequence they will be reassured by your explination. they just need to be resold. they forget why they are using you in the first place.
i tried to increase frequency today at a dealership i clean. i also tried upselling protector. he has to talk to the owner but i will mention it again next time. starting to plant that seed.