If you took your view of cleaners from this thread alone, you’d think there was nothing between brilliant ones who are like gold dust, have endless waiting lists and can charge what they like at one extreme, and useless, ten a penny slatterns who take the piss, eat your food and break your valuables at the other. While I’m sure both extremes exist, I’d suggest the majority are somewhere in the middle. Some people might be prepared to pay £16ph for someone in demand, but is say most are just looking for someone who turns up on time, doesn’t steal and does a decent job so that they don’t have to do it themselves. And it’s the average cleaners charging an average price that the OP has to consider.
OP - be honest with yourself about your potential client base and your local market. If you drop these clients, how easily can you replace them? Are good cleaners in short supply nearby - and are there customers with the disposable income to pay for them? If so, you may get new clients easily. If, on the other hand, there are a lot of people charging a similar amount to you or less, your ex-clients may just shrug their shoulders and go elsewhere, while potential new clients will have plenty of choice. Also bear in mind that:
A) a cleaner may be a luxury for many post-lockdown;
B) many more people who’ve lost their jobs - bar staff, shop workers etc. - will be looking for work and might see cleaning as a good place to start. Pub and office cleaners who can’t go back to work in those locations yet may also switch to domestic cleaning.
In short, it’s likely that, over the next few months, there will be a drop in the number of jobs and an increase in the amount of competition. Think carefully before dropping clients.