Most resources mention some type of process of rinsing with detergent etc.
Can I just use a magnifying glass in order to see a potential bug?
Also, why do the resources say to use soap or detergent... Why does water not suffice?
The challenge with strawberries is that many bugs are either too small to be seen to the untrained eye, or nest in the depths of the strawberry and only come out with soaking.
The wetting, anti-redeposant and dispersant power of detergents can better eliminate dirt and insects. The intensive rinsing that ensues ensures their total elimination.
However the prescribed method for strawberries varies depending who you as
This is partly a difference of opinion whether insects too small to be seen count as tolaim. I quoted here multiple sources showing halacha is not concerned by what the eye cannot see. But I heard that it is also a question of training once eyes to recognize insects. Apparently, once a specialist shows them to you on a strawberry, you start to recognize things that previously you would not have. In that sense, some training, rinsing and a magnifying glass might work for you.