I've been using the OneBlade a lot this year and despite the replacement advice I'm still using the blade I bought it with which means it's approaching 7 months old and I use it maybe two times a week, mostly with a comb and only dry (occasionally with KoS oil if it's clammy). No tugging or pulling yet.
I can't tell you how many times I get a pop up from my printer saying "attention, ink is low and print quality may be impacted! Change ink!" Then I pull up my printer menu and see I still have 25% or more of the ink left. I also then bet 90% of people run to Walmart and buy a new ink cartridge and toss the old one without checking.
I believe it is well known that laser printer cartridges can have their life doubled with a simple hack using black tape.
I took advantage of a discount offer and ordered two more replacement blades. That was before i read Rimramman's post. I'll watch out for the green arrow and see how things go. Thanks.