Chosen Solution
I tried to adhere a glass screen protector to my Samsung S9+ and made a mess of the loca glue. The glue got into the top speaker grill and I tried to clean it out with denatured alcohol / methylated spirits. Unfortunately, right now the speaker sounds crackly. I’m thinking the denatured alcohol got inside plus the partially dissolved loca glue. So what are my options? Can I fix the speaker by bathing it in more methylated spirits or buying some electronics contacts cleaner? Or do I have to open the entire phone, losing the waterproofness in the process, and replace the entire speaker?
Sounds like you have damaged the speaker and it will need to be replaced. Cleaners can clear the mesh but they will also leak into the speaker itself.
With isopropyl alcohol, a syringe and a small paintbrush you can do the trick. Just squirt some alcohol onto the speaker so it penetrates the speaker. Put on some loud music and let it play while adding more alcohol. Repeat this for like 10 times and in the meantime gently tap the speaker grill with the brush so the small hairs get inside the speaker and loosen the glue sticking to the grill. After like 10 minutes hold your phone firmly with the screen downwards and tap it against your other hand so the isopropyl with the dissolved loca can come out. Repeat this until the crackling is gone. Did it twice this way on my s9 plus and works fine.
I had the same problem with my S9 plus. Wanted to fix screen protector and some of the glue got inside my speaker. Sounds started to crack. Yesterday, I used perfume and tooth brush to clean it. Luckily it worked. Now it works fine.
I had the same problem. What I did was, added some baby cologne on the grille of the earpiece, let it soak for like 10 seconds, then gently brushed it with a toothbrush. After that, the crackling was completely gone!!!
Please don’t take any risk first you conform with Service Center how expensive your smartphone part then you do any Experiment!
