Usually when I have a couple mill in there, though lately I've been trying to ignore it.
when I remember. I tend to forget to clear them for weeks, but it's usually after 1-3 million have accumulated in them.
Either when I am completely broke or just bored,lol.
I'm trying to get the Shop Till achievement right now, so I'm letting it sit and accumulate. I've still got another 200 mil to go, so it might be a while. Once I'm finished with it, though, I think I'll check it once a month or so and treat myself a bit with some of the income I've earned through it.
Several times a day. I want the achievements but I also want my money!
I'm still trying to get the shop till achievement, so I don't clear mine at all.
I'm more than halfway there! But it's still going to take a looong time to actually get the achievement. D:
I really want to clear it though.
I keep myself from gathering my till until it's at least 1 mil. It feels more rewarding that way.
Never. For me, There's no point anymore since they we no longer have bank interest.
[flower=CastlesInTheSky] [tot=CastlesInTheSky] Dear users who keep blocking me....Remind me again, who TF are yous? ¯(ツ)/¯
I clear it every time I get a purchase notification.
All of my Wishlists! I can bite for: Bindi Bite, Butterfly Bruise, Caterkiller, Clusterflux, Cryomorph, Crystalitis, Death Roe, Death Slug, Fevermore, Metalmorphosis, Sickura
I clear mine almost every time I get a notification that something was bought.
Have so far never cleared my shops till not even once ^^;
I have to admit that I usually don't check my shop till for months. Definitely over 4-5 months.
。゚・.☆☆゚.・。゚ ☆゚.・。゚ 。゚・.☆[tp=Yuri445] ☆゚.・。゚ [egg=Yuri445] 。゚・.☆
Usually I clear my till everyday, I'm an avid restocker so if I keep up with autopricing it's everyday.
I check my till every time I get a notification that a purchase was made x)
I usually try to collect a nice amount in the till before I empty it. It could be couple of weeks or even longer.

Right now I'm waiting for an achievement so I haven't touched it in a long time.
Only some odd million left to collect... It's so difficult seeing the money sitting there knowing I can't touch it.
we have the same problem haha. Good luck!