How to get my suction cups to stay stuck

[reeferdude]

I cant make them stay stuck to the glass!!!!

 

[zack schwartz]

are they clean and free of algae, mine won't stick to coralline algae on my glass.

 

[plum70rt]

if they are out of the water, use a little drop of silicone,
they stay put then

 

[zack schwartz]

great idea thanks plum, needed a way for mine to stick to my corraline algae.

 

[brooklyn johnny]

Use a razor to clean wherever they are going to be stuck... that works for me...

 

[zack schwartz]

I don't have glass, and kent scraper not working to well.