I have found the ELBs to be sort of effortless to maintain, and I actually kinda love them in general. nothing like lining a bunch of ELBs with very little material in each and taking multiple flavor blasts in a row. when I took the EVO on vacation to share with a bunch of my friends last month, we would occasionally sit around a table and each load up an ELB for ourselves. we would then pass the EVO around the table, each taking a rip, but keeping our own ELBs the whole time. it's just so easy to pop out an ELB and pop in a new one. it was great. everyone had their own ELB so they could use whatever quantity or material they wanted, everybody got their own green hit and took their extraction as far as they wanted, and the ritual of rotation was preserved. one of my good friends ended up purchasing an EVO after the trip.
anyway I have a little brush that is perfectly suited for the job, and I just brush out each ELB pretty thoroughly after each use. I use 6 ELBs in rotation at the moment and do an ISO soak about every week. rinse the ELBs under a fast running faucet of cold water as I pluck them out of the ISO, let them dry and they come out mostly pristine. I'm not seeing blocked holes. I think regular brushing keeps them clean and takes minimal time and effort