affordable effective but has pooped out [SEP] i had major dental work extractions jawbone surgery grafting dry socket infection implants and needed something to help keep the area clean and emptied out given that my tissue did not bond properly to the implants thus allowing food inthe unit has generally worked well for me and i like a lot about it including how long it would go between chargesthings i do not like it seems impossible not to taint the cleanliness of the water reservoir when opening its little door i suggest filling the reservoir with hypochlorous acid natures germ killer and letting the hypochlorous disinfect the door it is too easy to accidentally turn the unit off when using it based on the location of the on off button i wish the unit would default to the last used power setting but i have had to reset it each time my unit is battery appears to be failing the unit will charge appropriately but then only run for seconds if i turn it back on it will run another few seconds then the process repeats as far as i know the unit cannot be opened to replace the batteries but correct me if i am wrong