Like many folks, I've been through a variety of oil sprayers over the years, ones from Tupperware and Pampered Chef are similar and both are prone to clogging.
A few months ago I got an EVO oil sprayer, and so far it has performed quite well, no clogging and it puts out a fan-shaped spray of oil which works fairly well when oiling the top of bread dough.
These come in two sizes, I got the smaller ones. (One has canola oil in it, the other has water.)