How can I get white marks out of clothes?

I have some t shirts that have white marks from deodorant on them. It's really annoying as a lot of the clothes are either dark or bright colours and it shows up as stripes across the side! How can I get them out? I've tried hand washing them as well as putting them in the machine but the marks are still there.

What can I do to get my clothes back to how they were? Any tips would be be greatly appreciated :) Thanks.

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).