[hairywalt]

Here's a UK study that concludes:

"Advising patients with ears blocked by wax to try bulb syringing before irrigation is effective and acceptable, and could significantly reduce the use of NHS resources."

So I feel they are a safe method of self treatment.

[hairywalt]

Forgot to add the link: https://pmc.ncbi.nlm.nih.gov/articles/PMC2148238/